# Self-employed tax organizer: the Schedule C questions

[Home](/) / [Tax organizers](/templates/tax-organizers) / Self-employed (Schedule C)

By [Arthur Teboul](/authors/arthur-teboul), Founder, DokuTrak. Published 2026-10-29, updated 2026-10-29.

> **In brief:** A self-employed tax organizer asks a sole proprietor the questions Schedule C turns on: the business itself, gross receipts and Forms 1099, inventory, car and home office use, equipment, and estimated payments. Each answer names the record to send, so the preparer gets the numbers and the proof together.

## The organizer: Self-employed tax organizer (Schedule C)

**Not advice.** This page is general information, not tax, legal or HR advice. Rules change: check the cited source and ask your own professional before you rely on it. Last reviewed October 25, 2026.

Fill in one organizer for each business. Answer every question with yes or no, or write in the figure.

For each yes, send the documents listed under it. If a number comes from your books, attach the report it came from.

Leave a question blank only if you do not know the answer, and say so in the notes.

### The business

Based on: Schedule C, lines A to J (Instructions for Schedule C)

- Business name and principal business or profession
- Business address, if different from your home address
- Employer identification number (EIN), if the business has one
- Accounting method: cash, accrual or other
- Did you start or buy this business during the year? If yes, send: Start date; Purchase agreement, if you bought it.
- Did you materially participate in the business, under the IRS tests?
- Did you pay anyone in a way that requires you to file Forms 1099? If yes, send: Copies of the Forms 1099-NEC and 1099-MISC you filed; Form W-9 for each payee.

### Income

Based on: Schedule C, Part I; Forms 1099-NEC, 1099-MISC and 1099-K

- Total gross receipts or sales, from your books If yes, send: Profit and loss report or sales summary for the year.
- Did you receive any Forms 1099-NEC? If yes, send: Every Form 1099-NEC received.
- Did you receive a Form 1099-K from a payment app, marketplace or card processor? If yes, send: Every Form 1099-K received.
- Did you receive a Form 1099-MISC for business income? If yes, send: Every Form 1099-MISC received.
- Refunds and price cuts given to customers
- Did customers tip you, through a card, an app or in cash? If yes, send: Tip totals for the year, and the Forms 1099 that include them.
- Other business income, such as interest on receivables or bad debts recovered

### Inventory and cost of goods sold (if it applies)

Based on: Schedule C, Part III

- Do you sell products or keep an inventory? If yes, send: Inventory count at year end; Purchase invoices for the year.
- Inventory at the start of the year
- Purchases during the year, minus items taken for personal use
- Cost of labor and materials
- Inventory at the end of the year
- How you value inventory: cost, lower of cost or market, or other

### Car or truck (if it applies)

Based on: Schedule C, Part IV; Publication 463

- Did you use a car or truck for the business? If yes, send: Mileage log for the year; Date the vehicle was first used for business.
- Business miles from January 1 to June 30, 2026
- Business miles from July 1 to December 31, 2026
- Total miles and commuting miles for the year
- Method: standard mileage rate or actual expenses
- Business parking fees and tolls
- Did you claim actual expenses for this vehicle? If yes, send: Gas, repair and insurance receipts; Lease or loan statements.

### Business use of your home (if it applies)

Based on: Schedule C, line 30; Form 8829; Publication 587

- Did you use part of your home regularly and only for the business? If yes, send: Measurements of the office area and of the whole home.
- Square feet of the office area and of the whole home
- Method: simplified or regular
- Are you using the regular method this year? If yes, send: Rent or mortgage interest statements; Utility and insurance bills for the home.

### Expenses and equipment

Based on: Schedule C, Part II; Form 4562

- Did you buy equipment, furniture, computers or software for the business? If yes, send: Invoice for each item; Date each item was first used in the business; Prior-year depreciation schedule (Form 4562).
- Advertising, insurance, legal and professional fees
- Office expenses, supplies, software and phone
- Travel and business meals
- Did you pay contractors or employees? If yes, send: Contractor invoices; Payroll reports, if you had employees.
- Did you pay business expenses from a personal account or card? If yes, send: Statements with the business charges marked.

### Estimated tax, health insurance and retirement

Based on: Form 1040-ES; Schedule SE; Schedule 1 (Form 1040)

- Did you make estimated tax payments for the year? If yes, send: Date and amount of each payment; Payment confirmations.
- Did you apply last year’s refund to this year’s estimated tax? If yes, send: Last year’s return.
- Did you pay health insurance premiums for yourself, your spouse or dependents? If yes, send: Premium statements for the year.
- Were you or your spouse eligible for an employer-subsidized health plan in any month? If yes, send: The months of eligibility.
- Did you put money into a SEP, SIMPLE or other retirement plan for yourself? If yes, send: Contribution statements from the plan.

Download: [PDF, fillable](https://dokutrak.com/downloads/pseo-v2/f3-tax-organizers/self-employed.pdf) · [Word](https://dokutrak.com/downloads/pseo-v2/f3-tax-organizers/self-employed.docx) · [Excel tracker](https://dokutrak.com/downloads/pseo-v2/f3-tax-organizers/self-employed.xlsx)

## Who this organizer is for

It is for anyone who reports business income on Schedule C. That means a sole proprietor, an independent contractor, or the owner of a one-member LLC. In tax terms, **a disregarded single-member LLC** is one the IRS does not treat as separate from its owner, and its owner counts as a sole proprietor ([IRS Topic no. 554, Self-employment tax](https://www.irs.gov/taxtopics/tc554)).

Schedule C also picks up amounts shown on Forms 1099, such as Form 1099-NEC, Form 1099-MISC and Form 1099-K ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). The rest of the return, such as wages, interest and dependents, belongs in the [individual tax organizer](/tools/document-checklist/tax-organizer). This one goes deep on the business.

The first questions set the frame for everything else. You need an EIN only in a few cases, for example if you have a qualified retirement plan or file employment or excise returns ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). Next, **material participation** means you meet one of the IRS tests for working in the business ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). If you do not, the activity is passive and its losses may be limited ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).

## Gross receipts and the Forms 1099 behind them

**The cash method** means you report income when you actually or constructively receive it and deduct expenses when you pay them ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). Income is constructively received when it is credited to your account or made available to you without restriction ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).

Gross receipts should include the amounts properly shown on your Forms 1099-NEC ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). If those forms add up to more than the receipts you report, you attach a statement that explains the gap ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). That is why the organizer asks for every [Form 1099-NEC](/documents/1099-nec), not a total.

- Payments through apps, marketplaces and card processors may show up on Form 1099-K ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).
- Other business income goes on a separate line, such as interest on accounts receivable, scrap sales or bad debts you recovered ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).
- Refunds and price cuts you gave customers are reported as returns and allowances ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).

## When the business sells products

If buying, making or selling goods is part of how you earn income, you generally take inventory into account at the start and end of the year ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). A small business taxpayer can choose not to keep an inventory, but must still use a method that clearly reflects income ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).

So the organizer asks for opening inventory, purchases, labor and materials, and closing inventory. It also asks how you value inventory. The instructions allow cost, the lower of cost or market, or another method the IRS allows ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).

## Car and home office: one method each, and the proof

Both the car and the home office let you choose between a simple rate and actual costs. The choice changes what you need to send, so the organizer asks for the method first.

For the car, you can take the standard mileage rate or the actual expenses ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). You must use actual expenses if you used five or more vehicles at the same time ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). The rate changes over time: in 2026 the business rate is 72.5 cents a mile through June 30 and 76 cents a mile from July 1 ([IRS, Standard mileage rates](https://www.irs.gov/tax-professionals/standard-mileage-rates)). Log miles by date, so each trip falls in the right period.

**Exclusive use** means you use a specific area of your home only for the business ([IRS Publication 587, Business Use of Your Home](https://www.irs.gov/publications/p587)). The area must also be used on a regular basis, and occasional use does not count ([IRS Publication 587, Business Use of Your Home](https://www.irs.gov/publications/p587)). You choose the simplified or the regular method each year ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).

| Expense | Simple option | Actual option | Records to keep |
| --- | --- | --- | --- |
| Car or truck | Business miles times the standard rate, plus parking and tolls ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)) | Business share of gas, repairs, insurance and depreciation | Log with date, destination, purpose and miles for each trip, and total miles for the year ([IRS Publication 463, Travel, Gift, and Car Expenses](https://www.irs.gov/publications/p463)) |
| Home office | Office square feet times $5, up to 300 square feet ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)) | Business share of rent or mortgage interest, utilities, insurance and repairs, on Form 8829 | Square footage of the office and of the whole home, and the home expense bills |

## Equipment, health insurance and retirement

Equipment questions need dates. Depreciation starts when you first use the property in the business, and you can elect to expense part or all of the cost of certain property under section 179 ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). Ask for the invoice and the date each item went into use.

Two common costs do not go on Schedule C at all. Health insurance you pay for yourself, your spouse and dependents may be deducted on Schedule 1 instead ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). The deduction is lost for any month you could have joined a health plan subsidized by your employer or your spouse’s employer, even if you did not join ([Instructions for Form 7206, Self-Employed Health Insurance Deduction](https://www.irs.gov/instructions/i7206)). Contributions to a SEP or similar plan made for you as the owner also go on Schedule 1, not Schedule C ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). The organizer still asks for both, because the same preparer needs them.

## Estimated payments and self-employment tax

You usually owe self-employment tax if your net earnings from self-employment were $400 or more ([IRS Topic no. 554, Self-employment tax](https://www.irs.gov/taxtopics/tc554)). The rate is 12.4% for Social Security and 2.9% for Medicare ([IRS Topic no. 554, Self-employment tax](https://www.irs.gov/taxtopics/tc554)). You can deduct one-half of the self-employment tax when you figure adjusted gross income ([IRS Topic no. 554, Self-employment tax](https://www.irs.gov/taxtopics/tc554)).

Because no employer withholds tax from business income, you may need to pay estimated tax during the year. In most cases you must pay it for 2026 if you expect to owe at least $1,000 in tax ([Form 1040-ES (2026), Estimated Tax for Individuals](https://www.irs.gov/pub/irs-pdf/f1040es.pdf)). The organizer asks for the date and amount of each payment, because the preparer must match them to IRS records.

1. First payment for 2026: due April 15, 2026 ([Form 1040-ES (2026), Estimated Tax for Individuals](https://www.irs.gov/pub/irs-pdf/f1040es.pdf)).
2. Second payment: due June 15, 2026 ([Form 1040-ES (2026), Estimated Tax for Individuals](https://www.irs.gov/pub/irs-pdf/f1040es.pdf)).
3. Third payment: due September 15, 2026 ([Form 1040-ES (2026), Estimated Tax for Individuals](https://www.irs.gov/pub/irs-pdf/f1040es.pdf)).
4. Fourth payment: due January 15, 2027, unless you file by February 1, 2027 and pay the full balance ([Form 1040-ES (2026), Estimated Tax for Individuals](https://www.irs.gov/pub/irs-pdf/f1040es.pdf)).

## Questions people ask

### Does a single-member LLC file Schedule C?

If the LLC is disregarded for federal income tax, its owner is treated as a sole proprietor and reports the business on Schedule C ([IRS Topic no. 554, Self-employment tax](https://www.irs.gov/taxtopics/tc554)).

### Do I need an EIN to file Schedule C?

Not always. You need one if you have a qualified retirement plan, file employment, excise, alcohol, tobacco or firearms returns, or pay gambling winnings ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)). Without an EIN, you leave that box blank.

### Can I switch between the simplified and regular home office method?

Yes. You choose the method each tax year, and a switch from one year to the next is not a change in accounting method ([Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc)).

### What mileage records does the IRS expect?

For each business use, record the date, the destination, the business purpose and the miles, plus the total miles for the year ([IRS Publication 463, Travel, Gift, and Car Expenses](https://www.irs.gov/publications/p463)). A log kept each week counts as a timely record ([IRS Publication 463, Travel, Gift, and Car Expenses](https://www.irs.gov/publications/p463)).

## Sources

- [Instructions for Schedule C (Form 1040)](https://www.irs.gov/instructions/i1040sc): Rules for the EIN, accounting method, material participation, gross receipts and Forms 1099, inventory, vehicles, the $5 simplified home office method, depreciation, health insurance and plan contributions.
- [Instructions for Form 7206, Self-Employed Health Insurance Deduction](https://www.irs.gov/instructions/i7206): No deduction for any month the taxpayer was eligible to participate in a health plan subsidized by their own or their spouse’s employer, even without participating.
- [IRS Topic no. 554, Self-employment tax](https://www.irs.gov/taxtopics/tc554): Who counts as self-employed, the $400 threshold, the 12.4% and 2.9% rates and the deduction for one-half of the tax.
- [Form 1040-ES (2026), Estimated Tax for Individuals](https://www.irs.gov/pub/irs-pdf/f1040es.pdf): Who must pay estimated tax for 2026 and the four payment due dates, from April 15, 2026 to January 15, 2027.
- [IRS Publication 463, Travel, Gift, and Car Expenses](https://www.irs.gov/publications/p463): What an adequate car expense record shows, and when a weekly log counts as timely kept.
- [IRS Publication 587, Business Use of Your Home](https://www.irs.gov/publications/p587): The exclusive use and regular use tests for a home office.
- [IRS, Standard mileage rates](https://www.irs.gov/tax-professionals/standard-mileage-rates): The 2026 business rate was 72.5 cents a mile from January 1 to June 30 and 76 cents a mile from July 1 to December 31.

## More on this topic

- [Client tax organizer (individual return)](/tools/document-checklist/tax-organizer)
- [Form 1099-NEC](/documents/1099-nec)
- [How to collect documents from clients](/blog/collect-documents-from-clients)
- [Tax document checklist](/blog/tax-document-checklist)

## About the author

Arthur Teboul (Founder, DokuTrak) is building DokuTrak after watching professionals lose hours chasing clients for documents over email. [Arthur Teboul](/authors/arthur-teboul).

How this page was made (methodology): it is built from the primary sources listed under Sources, and every rule and figure on it links to the source it comes from. Last updated October 25, 2026. Spotted an error or a rule that changed? [Contact us](/contact).

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