Does AttachKit calculate my deductions?

No. Schedule C deductions (home office, vehicle, depreciation, COGS) require judgment calls AttachKit isn't qualified to make. Enter the amounts yourself or have your CPA review before filing.

What's the difference between Schedule C and Schedule C-EZ?

C-EZ was retired after tax year 2018. Everyone uses Schedule C now, even with under-$5K expenses.

Do I file Schedule C with my 1040?

Yes. Schedule C is an attachment to Form 1040; the net profit/loss flows to Schedule 1 line 3, then to your 1040.

Tax · Schedule C

Fill Schedule C (Profit or Loss from Business) online

Schedule C is the IRS form sole proprietors and single-member LLCs file with Form 1040 to report business profit or loss. Two pages, dozens of expense categories. AttachKit's profile-based drafting speeds the parts that repeat every year (your business name, EIN, address, principal business code) so you can focus on the line-items.

The work happens in your browser — open DevTools → Network and watch: the file is never uploaded to do it.

Who needs it: Sole proprietors. Single-member LLCs taxed as disregarded entities. Side-business filers (Uber, freelance writing, consulting) whose income exceeds the $400 self-employment threshold.

Need a blank Schedule C? Download from the source, then drop it in below.

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Why fill it here

Draft business name, EIN, address, accounting method, and principal business code from your profile.
Manual entry for income (line 1) + expense lines — AttachKit doesn't compute deductions for you, but the structured fields make math easier.
Pairs with /fill/schedule-se for the self-employment tax computation.
Free to fill unlimited forms (10 signed PDFs/mo on the free tier). Pro tier ($12/mo) for unlimited.

Fill your Schedule C now

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Schedule C questions, answered

General information, not legal or tax advice

This page is general information about a commonly-used tax form. Tax law is complex and fact-specific — for advice on your return, consult a CPA, enrolled agent, or tax attorney. AttachKit fills the PDF; the IRS holds you responsible for what's on it.

Does AttachKit calculate my deductions?: No. Schedule C deductions (home office, vehicle, depreciation, COGS) require judgment calls AttachKit isn't qualified to make. Enter the amounts yourself or have your CPA review before filing.
What's the difference between Schedule C and Schedule C-EZ?: C-EZ was retired after tax year 2018. Everyone uses Schedule C now, even with under-$5K expenses.
Do I file Schedule C with my 1040?: Yes. Schedule C is an attachment to Form 1040; the net profit/loss flows to Schedule 1 line 3, then to your 1040.

More forms: Form 941 · Form 1040 · Form 2553 · Form 2848 · Form 4868 · Browse all 126 forms →

Done filling? Also sign a PDF, convert PDF to Word, Word to PDF — or see AttachKit for accountants.

AttachKit is a private, independent tool for filling and signing PDFs on your own device. It is not a government agency, law firm, or filing service, and is not affiliated with or endorsed by the IRS, USCIS, the U.S. Department of State, or any government body. Forms are provided for convenience — always download the current version and instructions from the official .gov website, and your completed document never leaves your browser.