C corp tax returns for brands, prepared from books that tie out.
A C corporation files Form 1120 each year and pays its own income tax. We prepare it from the books we close every month, with your 1099-K tied out, inventory carried into cost of goods sold and estimated payments worked out from closed months. $1,099 a year with a bookkeeping plan, one state return included.
Free books review · written quote · every return approved by you before it is filed
Form 1120 draft from the closed books
| Net receipts, all channels | 1,240,000.00 |
|---|---|
| Cost of goods sold | (562,000.00) |
| Gross profit | 678,000.00 |
| Payroll, fees, ads, shipping and other expenses | (541,000.00) |
| Taxable income before special deductions | 137,000.00 |
| Expenses tied to the ledger | 541,000.00 ✓ |
Also checked 2026
- Inventory valued at year-end ✓
- Estimated payments recorded ✓
- 1099-K gross tied to sales ✓
- Shareholder loans kept apart ✓
15th day of the 4th month, calendar year
Illustrative figures — demo store, not a client
Your brand is a C corporation.
Domestic corporations, and LLCs that elected to be taxed as a corporation.
The company pays its own tax, so every figure counts.
Inventory, fees and payouts all reach the return through the books.
The corporation files and pays
All domestic corporations file an income tax return unless they are exempt. An LLC files Form 1120 only when it elected to be taxed as a corporation.
Estimated tax through the year
Corporations generally pay estimated tax if they expect to owe $500 or more. Closed monthly books mean each payment is worked out from real figures.
Try the quarterly tax calculator →Your 1099-K, tied out from the books
The IRS says the gross amount on a Form 1099-K isn't adjusted for fees, credits, refunds, shipping or discounts. We start from that same gross figure and show every deduction down to your payouts, so the return reports what you actually earned.
Read the answer →Inventory and cost of goods sold
When merchandise is an income-producing factor, the IRS instructions generally have you count inventory at the start and end of the year. We carry your counted stock and landed cost straight into the cost of goods sold.
Read the answer →From closed books to a return you approve.
Prepared, reviewed, and approved by you before it is filed.
- Year-end close and inventory count January
- 1099-K tied to recorded sales January
- Form 1120, with cost of goods sold Yearly
- Estimated payments worked out each quarter Quarterly
- One state corporate return Yearly
- Form 7004 extension by the due date, when needed As needed
Your books close by day 15 of each month, so each quarter's estimate starts from closed months.
Profit & Loss — September
| Amazon sales | 38,420.00 |
|---|---|
| Shopify sales | 21,760.00 |
| eBay sales | 4,310.00 |
| Net sales | 64,490.00 |
| Cost of goods sold | (23,190.40) |
| Marketplace fees | (9,874.15) |
| Gross profit | 31,425.45 |
Sample · illustrative figures · not a client
C corp returns, priced per year.
Form 1120 is $1,099 a year with a bookkeeping plan, or $1,699 on its own, with one state return included. Each extra state is $149; any fee a state itself charges is separate. Yours is confirmed in writing after your free books review.
| Return | With a plan | Tax only |
|---|---|---|
| Form 1120 C corporation returnOne state return included; corporations and LLCs taxed as corporations · per year | $1,099 | $1,699 |
| Each extra state returnEach further state return filed alongside your federal return · per state, per year | $149 | $149 |
| Quarterly estimated tax figuresEach quarter's estimate worked out from your closed books · per quarter | $79 | $129 |
| Extension of time to fileForm 4868 or Form 7004, by the regular due date | Included | |
| 1099-K reconciliationEach Form 1099-K tied to your recorded sales | Included | |
| Prior-year or missed returnBooks for the year caught up first | That year's return price, plus catch-up books at $149 a month behind | |
Catch-up bookkeeping
Behind on your books? We bring the missing months current first, so the return starts from a full year. See catch-up →
Four steps to books you can trust.
Free books review
You send the access invitations. We look at where your books stand.
Quote in writing
Your plan and price, before you commit to anything.
Catch-up
Missing months brought current and reconciled.
Monthly close
Books closed every month, reports in your inbox.
Your return starts in the books we already keep.
We prepare from your own QuickBooks Online or Xero file, with settlements brought in through A2X or Link My Books.
Works with
Product names belong to their owners.
Answers for C corp sellers
Is inventory an asset?
Why unsold stock sits on the balance sheet, not in expenses.
Read the answer → AnswerWhy doesn't my 1099-K match what I actually made?
Gross payments before fees and refunds, and how to tie it out.
Read the answer → AnswerHow to calculate cost of goods sold for an online store
Beginning inventory, purchases, ending inventory, with landed cost.
Read the answer → AnswerCash vs accrual for online sellers
Which method fits, and what inventory changes.
Read the answer →Self-employment tax calculator →Quarterly tax calculator →
Behind on your books? See catch-up bookkeeping →Get my free books review →Or check your books yourself with the free self-check →
Sources
- IRS — Instructions for Form 1120 (2025) · fetched 2026-10-20
- IRS — Instructions for Form 7004 (Rev. December 2025) · fetched 2026-10-20
- IRS — Estimated taxes · fetched 2026-10-20
- IRS — What to do with Form 1099-K · fetched 2026-10-20
C corp return questions
Who files Form 1120?
All domestic corporations, unless exempt under section 501. An LLC files Form 1120 only if it filed Form 8832 to be taxed as a corporation; otherwise a multi-owner LLC generally files Form 1065.
When is Form 1120 due?
By the 15th day of the 4th month after the tax year ends: April 15 for a calendar year. A corporation with a June 30 year-end files by the 15th day of the 3rd month.
Can we get more time?
Yes. Form 7004, sent by the regular due date, gives an automatic extension of time to file, generally 6 months. It does not extend the time to pay tax.
Does a C corp pay estimated tax?
Generally yes, if it expects to owe $500 or more when the return is filed. We work out each quarter from your closed books for $79 a quarter with a plan.
Do you prepare returns in my state?
Yes. We prepare C corporation returns for businesses in 49 states: every state but Nevada. One state return is included; each extra state is $149.
How much does a C corp return cost?
$1,099 a year with a bookkeeping plan, or $1,699 on its own, with one state return included. Each extra state is $149.
See where your books stand — free.
Get a written review of every channel: what's reconciled, what's missing, and the exact price to fix it. Free, with no commitment.
Get my free books review