For first-time Schedule C filers · 2026

Self-employment taxes, read off the IRS form — one job, one line at a time.

Trade Tax Desk reads the IRS form a specific job actually files — one tax year, one line at a time. Every number traces to an IRS document, a tax year, a line, and a check date; draft forms are labeled as drafts.

Start with your job

6 job hubs · 19-article catalogue

Find it by form line

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Form 1040-ES (2026)Line 15
Amount of each estimated tax payment
Pub. 505, Worksheet 2-1Line 12c
Required annual payment (safe harbor)
Schedule C (2026)Line 9 · Part IV 43–47b
Car and truck expenses
Schedule C (2026)Line 30
Expenses for business use of your home
Schedule C (2026)Line 20b
Rent on other business property (booth rent)
Schedule AI (Form 2210)Line 27
Annualized income installment
Schedule 1 (2026 draft)Line 16
Retirement plan contributions

This index as its own page: Find it by form line

Free one-page sheet · PDF

The $1,000 Line

Reads a single line of the 2026 Estimated Tax Worksheet — line 14b, the $1,000 test — and prints the four 2026 payment dates and the January 31 filing exception, with its sources on the page.

Sources: Publication 505 (2026) · Form 1040-ES (2026)
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Latest articles

  1. Article 19
    Retail Product at the Booth 2026: A Hairstylist's Schedule C Fork — Part III, Line 22, or No COGS Booth/Suite Hairstylist & Barber · Core line: Schedule C line 1, line 4, line 22, line 31, and Part III (lines 35–42)
  2. Article 18
    You May Owe Your Salon Owner a 1099-MISC Booth/Suite Hairstylist & Barber · Core line: Form 1099-MISC, box 1
  3. Article 17
    Booth Rent on Schedule C Line 20b: A Booth Renter's 2026 Walk Booth/Suite Hairstylist & Barber · Core line: Schedule C (Form 1040), line 20b
  4. Article 16
    Business, Hobby, or Personal Items? Where Each Marketplace Sale Lands in 2026 Marketplace Seller · Core line: the fork before Schedule C, line 1
  5. Article 15
    Schedule C Part III for Makers 2025: Cost of Goods Sold, From Line 35 to Line 4 Marketplace Seller · Core line: Schedule C, line 42 → line 4
  6. Article 14
    Etsy Seller Taxes 2026: Your 1099-K Is Gross — a Schedule C Line 1 Walkthrough Marketplace Seller · Core line: Schedule C (Form 1040), line 1
  7. Article 13
    Solo 401k vs SEP IRA 2026: A Freelance Designer's Two Builds to One Line Freelance Designer / Consultant · Core line: Schedule 1 (Form 1040) (2026 draft), line 16
  8. Article 12
  9. Article 11
    Safe Harbor Estimated Taxes 2026: The Fourth Payment, for Freelance Designers Freelance Designer / Consultant · Core line: Publication 505 (2026), Worksheet 2-1, line 12c
  10. Article 10
    Realtor Car Expenses 2026: The Split Mileage Rate on Schedule C Line 9 Real Estate Agent · Core line: Schedule C (Form 1040) (2026), line 9 — car and truck expenses; with Part IV, lines 43–47b
  11. Article 9
    Freelance Designer Home Office 2026: Simplified Method vs Form 8829 — Schedule C Line 30 Freelance Designer / Consultant · Core line: Schedule C (Form 1040) (2026), line 30 — expenses for business use of your home
  12. Article 8
    Freelance Taxes 2026: Designer & Consultant Schedule C, Line by Line Freelance Designer / Consultant · Core line: Schedule C (Form 1040) (2026), line 31 — net profit or (loss)
  13. Article 7
    YouTube Taxes 2026: Where Creator Income Lands on Schedule C Line 1 Solo Creator · Core line: Schedule C (Form 1040) (2026), line 1 — gross receipts or sales
  14. Article 5
    How to Fill Out Schedule C for Realtors, 2026: The Income Side First (Line 7) Real Estate Agent · Core line: Schedule C (Form 1040) (2026), line 7 — gross income
  15. Article 4
    Solo Creator, First Income in October 2026: Form 2210 and the Annualized Worksheet Solo Creator · Core line: Schedule AI (Form 2210), line 27 — annualized income installment; entered on Form 2210, Part III, line 10
  16. Article 3
    Do I Have to Report Income Without a 1099? (2026) Real Estate Agent · Core line: Schedule C (Form 1040) (2026 draft), line 1 — gross receipts or sales
  17. Article 2
    Self-Employment Tax 2026, Line by Line: Where It Is Figured — Schedule SE, Line 12 Real Estate Agent · Core line: Schedule SE (Form 1040) (2026), line 12
  18. Article 1
    Calculating Quarterly Estimated Taxes 2026: A Realtor's Form 1040-ES Walkthrough Real Estate Agent · Core line: Form 1040-ES (2026), line 15