A clear guide to Schedule C, Form 1099-K, and filing requirements for e-commerce sellers.
One of the most common questions for new online sellers is: "What tax form do I use to report my income?" The answer depends on your business structure, the type of activity, and how you receive payments.
Whether you're selling on Amazon, Etsy, or your own website, the IRS requires you to report all income—even if you don't receive a Form 1099-K. This guide explains the forms you need, the thresholds that matter, and how to maximize deductions.
Let's start with the most important form for most online sellers: Schedule C.
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Your business structure determines which tax form you file. Here's a quick breakdown:
| Business Structure | Form to File | Key Details |
|---|---|---|
| Sole Proprietorship | Schedule C (Form 1040) | Most common for online sellers. Report profit or loss on personal return. |
| Partnership | Form 1065 | Partnership files information return; partners get Schedule K-1. |
| S Corporation | Form 1120-S | Pass-through entity; shareholders report on personal returns. |
| C Corporation | Form 1120 | Separate taxable entity; corporate tax rates apply. |
If you're a sole proprietor—and most online sellers start this way—you'll use Schedule C to report your income and expenses [citation:2].
Schedule C (Form 1040), Profit or Loss from Business, is where you report income and expenses from your online business. This form flows into your personal tax return.
If your net profit is $400 or more, you'll also need to file Schedule SE to pay self-employment tax [citation:2].
Form 1099-K is issued by payment platforms (PayPal, Stripe, Amazon, Etsy) to report gross payment transactions [citation:4]. It's an informational form—you must report all income even if you don't receive one [citation:7].
The "One Big Beautiful Bill Act" reinstated the higher threshold: $20,000 in gross payments AND 200+ transactions to trigger a 1099-K [citation:7][citation:9].
Important: Some states (e.g., MA, IL, VT) have lower thresholds—you may still receive a 1099-K even if you're below the federal requirement [citation:7].
Box 1a shows gross payments—not your profit. It does not subtract fees, refunds, or shipping costs [citation:9].
You report the gross amount on Schedule C, Line 1, and then deduct fees and expenses separately [citation:7].
The IRS distinguishes between a business (profit motive) and a hobby (not for profit). This affects what forms you use and what you can deduct [citation:2].
If you sell regularly and put time and effort into making a profit, the IRS is likely to consider it a business [citation:10].
One of the biggest advantages of being a business is the ability to deduct expenses. Here are common deductions for online sellers:
| Category | Examples | Where to Deduct |
|---|---|---|
| Platform Fees | Etsy/Amazon fees, PayPal/Stripe fees | Schedule C, Part II |
| Shipping | Postage, labels, packing supplies | Schedule C, Line 27a or Supplies |
| Cost of Goods Sold | Raw materials, inventory, freight-in | Schedule C, Part III |
| Home Office | Dedicated space for business | Simplified ($5/sq ft) or actual method |
| Software & Subscriptions | QuickBooks, Canva, SEO tools | Schedule C, Part II |
For detailed expense tracking, check out our E-commerce Bookkeeping Services.
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