Schedule C software: file Schedule C online with Form 1040 and Schedule SE

What Schedule C software has to get right

Schedule C (Form 1040), Profit or Loss From Business, has five parts, and software earns its keep by moving your numbers through all of them in the right order without you learning the form.

The number at the bottom of Part II is the one that matters. It carries to Schedule 1 (Form 1040), Part I, line 3 as ordinary income, and separately to Schedule SE, where self-employment tax of 15.3 percent applies to 92.35 percent of it once net earnings reach $400. Getting Schedule C right and Schedule SE wrong is a common way to end up with a notice, which is why the two belong in the same tool rather than two.

You file one Schedule C per business. If you drive for a rideshare app and also sell online, those are two trades with two business codes and two forms. TaxFile handles multiple Schedule Cs on the same return.

Deductions the software applies for 2025

Most of the money in a sole proprietor return sits in a handful of deductions with specific 2025 figures. These are the ones worth checking your software actually applies.

Mileage is the single biggest miss for solo businesses. At 70 cents a mile, 6,000 documented business miles is a $4,200 deduction, worth well over $1,500 in real tax once self-employment tax is counted. The home office deduction requires space used regularly and exclusively for business, and the simplified method skips the receipts entirely.

Health insurance premiums are a frequent misfile. If you are self-employed and not eligible for an employer plan, they are deducted on Schedule 1, not as a Schedule C business expense. The Schedule C explainer walks through each part of the form, and the 1099 deductions list covers the expense categories in detail.

Who files a Schedule C

Schedule C is the default for anyone doing business on their own account. No registration, license, or business name is required for the IRS to treat you as a sole proprietor.

• Independent contractors and freelancers paid on a 1099-NEC, and often paid with no form at all
• Gig workers driving for rideshare or delivery platforms
• Online sellers on Etsy, eBay, Amazon, or Shopify selling for profit
• Single-member LLCs that have not elected corporate tax treatment, which is the default
• Side businesses run alongside a W-2 job, on the same Form 1040

Partnerships file Form 1065 and S corporations file Form 1120-S, so neither uses Schedule C. Note that Schedule C-EZ no longer exists; the IRS retired the short version after 2018, so every sole proprietor now files the full form.

Your Schedule C income should usually exceed the total of your 1099s, not match it. Clients paying under $600 send nothing, cash and checks generate no form, and payment apps only issue a 1099-K above $20,000 and 200 transactions. All of it is still reportable. If you are working out what you will owe, the self-employment tax calculator estimates the Schedule SE side, and the quarterly tax calculator sizes your estimated payments.

How TaxFile builds your Schedule C

• Upload or talk. Drop in your 1099s and business records and it reads them, or describe the business and it asks what it needs.
• Categorized automatically. Income and expenses land on the correct Schedule C lines, with mileage, home office, and supplies applied where they fit.
• Schedule SE computed. Net profit carries into self-employment tax, half of it comes back as a deduction, and the QBI deduction is applied if you qualify.
• Error check, then you approve. Nothing is e-filed until you review and approve every line, through an authorized IRS e-file provider.

Pricing is $89 for the self-employed tier and $199 for business, plus $19 for each state return. There is no free tier. For the wider picture including quarterly payments and Schedule SE, see self-employed tax filing, or LLC tax filing if you have formed an entity. TaxFile does not handle capital gains on Schedule D, rental income on Schedule E, or cryptocurrency, and does not e-file amended returns. It is self-prepared tax software and does not provide personalized tax advice; for complex situations, consult a CPA or tax professional.