The panic is a year of deposits you cannot explain in March. The form is the easy part once the packet is done.
Prepare for tax season by finishing that packet before you open the return. IRS Publication 583 says a paid preparer signs the return and is primarily responsible for its substantive accuracy. The same publication says you are responsible for the information the preparer needs and for every item on the return. Avoid tax season panic by doing the sorting while you remember what each payment was.
Key Takeaways
- Finish the ledger first. SCORE's tax preparation checklist starts with a complete general ledger and a check that every transaction in the software is recorded. Compare this year with last year's return before you hunt for new deductions.
- The form follows the entity. Publication 583 says an LLC files the forms that match its tax election. The Taxpayer Advocate Service lists a different set for a sole proprietor and a partnership and a C corporation and an S corporation.
- Write down estimated tax you paid during the year. Individuals generally use Form 1040-ES when they expect to owe one thousand dollars or more. A corporation generally pays estimated tax when it expects to owe five hundred dollars or more.
- Owner money is not a business expense by default. SCORE says to record money you put in and money you took out. Bench says a payment to yourself on a sole proprietorship or a single-member LLC belongs in owner's draw.
- Keep the packet after you file. Bench's tax-season guide says three years. Publication 583's table is longer for employment tax and omitted income and bad debts and assets.
Table of Contents
What you are filing
Tax preparation for a small business starts with the right return. Publication 583 says every business except a partnership files an annual income tax return. A partnership files an information return. The form depends on how the business is organized.
The Taxpayer Advocate Service publishes the same map.
| If this is you | The federal forms that service lists |
|---|---|
| Sole proprietor | Form 1040 or 1040-SR with Schedule C or F, Schedule SE, Form 1040-ES, and employment forms 940 and 941 or 944 or 943 if you have employees |
| Partnership | Form 1065, plus those employment forms if you have employees |
| Partner | Form 1040 or 1040-SR with Schedule E, Schedule SE, and Form 1040-ES |
| C corporation | Form 1120 and Form 1120-W for estimated tax, plus employment forms if you have employees |
| S corporation | Form 1120-S and the employment forms if you have employees |
| S corporation shareholder | Form 1040 or 1040-SR with Schedule E, and Form 1040-ES |
Publication 583’s table covers the same entities and the same main forms. It says to file a separate schedule for each business. It says other schedules may be needed. It lists Form 1120-W for estimated tax and adds the words corporation only. The Taxpayer Advocate Service says that form is for a C corporation.
A tax prep checklist for an LLC is not a fifth column. Publication 583 says the taxes and the forms follow how you elected to have the LLC treated. That can be a corporation or a partnership or part of the owner’s return. If you are unsure which election is on file, look it up before you hand the books to anyone. This article does not pick the election for you.
Self-employment tax is part of the individual packet. Publication 583 says you pay it and file Schedule SE if your net earnings from self-employment were four hundred dollars or more. A second trigger is church employee income of one hundred eight dollars and twenty-eight cents or more. You can deduct a portion of that tax as an adjustment to income on Form 1040 or 1040-SR. The publication points to Publication 334 for the rest.
Year-end bookkeeping
Year-end bookkeeping is the work that makes the return possible. SCORE’s checklist puts four items at the top.
- Finish the general ledger. A handwritten ledger and a computer ledger both count. Incomplete is the problem.
- If the books live in software, confirm every transaction is recorded. SCORE names QuickBooks and Xero and Wave as examples of the platforms.
- Compare this year’s income and expenses with last year’s return so the numbers stay consistent.
- List carryover items. SCORE means prior-year operating losses and depreciation that moves into this year.
Bench’s tax-season guide describes the reports that come out of finished books. The year-end package includes an income statement and a balance sheet and a general ledger and a trial balance. You or your CPA can use that package to file. Ask for those four reports when the ledger is done. A stack of bank downloads is not a substitute.
Publication 583 says you should reconcile the business checking account each month. The statement and the checkbook and the books should agree. Enter bank charges the statement shows. Note deposits and checks that have not cleared. A year of skipped reconciliations is the pile people face in March.
Record expenses when they occur. The publication says it is generally best to record them daily. Bench’s mistakes guide says a delayed stack has a cost. You forget what a receipt was for. Deductible costs never get written down. Decisions use old numbers. Bench says monthly books are the minimum and weekly books are better.
Organize books for taxes by year and by type of income or expense. Publication 583 says supporting documents include sales slips and paid bills and invoices and receipts and deposit slips and canceled checks. Proof of payment by itself does not establish a deduction. Keep the invoice or the slip that shows the cost was for the business.
Income and the costs under it
If you do not have a summarized ledger, SCORE says to gather the income papers anyway.
- Sales reports for all sales
- Bank statements that show cash receipts
- Records from payment platforms. SCORE names PayPal and Stripe and Cash App.
- Forms 1099 you received for products or services
- Investment income the business earned
Publication 583’s list of gross-receipt documents lines up with that packet. It includes cash register tapes and deposit slips and receipt books and invoices and card slips and Forms 1099-MISC and Forms 1099-NEC.
SCORE’s expense list is the other half of the folder.
- Facilities. Office rent and utilities and home office costs if they apply.
- Professional fees. Accounting and bookkeeping and legal fees and subcontractor payments.
- Operations. Software subscriptions and marketing and advertising and inventory and supplies.
- Vehicle costs. Fuel and repairs or business mileage. SCORE says to leave commuting miles out.
- Records of large equipment purchases.
Publication 583 says a vehicle used for business and personal trips has to be divided. You divide by the miles driven for each purpose. The publication’s flower-shop illustration is a van driven twenty thousand miles, with sixteen thousand for deliveries and four thousand for personal use. Only the business share is the business cost. Those miles are the example. They are not your ratio.
The same publication says you fail the home-office exclusive-use test if you use the area for business and for personal purposes. SCORE’s “if applicable” is doing real work. Do not drop a home-office figure into the packet until that test is met. The details are in Publication 583.
The Taxpayer Advocate Service says the records should track gross receipts and inventory and expenses. Inventory includes merchandise you withdrew for personal use. If you took goods home, write that down. Leaving those goods in sales overstates income.
Sales tax you collected is a similar trap. Publication 583’s recordkeeping example pulls that tax out of receipts before the owner calls the rest income. The owner collected it for the state. It is not income and it is not a deduction. Bench’s tax-season guide adds that states may levy sales tax and excise tax. Read your state’s rules. This article does not list them.
Owner money and assets
SCORE says to document personal money you invested and money you paid out. Those are contributions and distributions. SCORE says personal receipts and business receipts should not be mixed.
Bench is more specific about the label. On a sole proprietorship or a single-member LLC, a payment to yourself is not an expense. Bench says to use owner’s draw. Calling it an expense lowers profit and shows the wrong taxable income.
New equipment and vehicles need their own page. SCORE says to identify purchases that may qualify for immediate expensing under section 179 or bonus depreciation. “May qualify” is the checklist’s wording. It is not a promise that this year’s purchase qualifies. Publication 583 says the asset file should show when and how you acquired it and the purchase price and improvements and the section 179 deduction and depreciation and how you used it. Keep the invoice with that page. The dollar limits live in IRS publications this checklist does not reprint. Ask the preparer to apply the limit for the year you acquired the asset.
Estimated tax you paid during the year
Get ready for taxes with a list of what you sent the IRS. Publication 583 says federal income tax is pay-as-you-go. You pay as you earn or receive the income. If withholding does not cover it, you might have to pay estimated tax. If you do not have to pay estimates, you may pay the balance when you file.
The thresholds in Publication 583 are the trigger. Sole proprietors and partners and S corporation shareholders generally pay estimated tax if they expect to owe one thousand dollars or more when they file. They use Form 1040-ES. Publication 505 has the rest. A corporation generally pays if it expects to owe five hundred dollars or more. Publication 542 has the corporate detail.
The IRS estimated-tax page divides the year into four periods. Income from January 1 through March 31 is due April 15. April 1 through May 31 is due June 15. June 1 through August 31 is due September 15. September 1 through December 31 is due January 15 of the next year. If the date falls on a Saturday or a Sunday or a legal holiday, the payment is on time on the next business day. The 2026 Form 1040-ES says you can skip the January 15 of 2027 payment if you file the 2026 return by February 1 of 2027 and pay the entire balance with the return. Use the form for the year you are paying.
The IRS estimated-tax page says most people avoid the underpayment penalty if they owe less than one thousand dollars after withholdings and credits. You avoid it if you paid at least 90 percent of the current year’s tax or 100 percent of the prior year’s tax. Use the smaller of those two. The page says higher-income taxpayers have special rules in Publication 505. The 2026 Form 1040-ES says to use 110 percent of the prior year’s tax if your 2025 adjusted gross income was more than one hundred fifty thousand dollars. The married-filing-separately figure on that form is seventy-five thousand dollars. Bring the preparer the dates and the amounts you paid. A missing payment on the return looks like tax you never sent.
Publication 583 says a sole proprietor or a partnership or an S corporation can view tax information on record with the IRS through a business tax account at IRS.gov/businessaccount. Use it to confirm the amounts the IRS has on file before you guess.
What to tell the preparer
Publication 583 says preparers include enrolled agents and CPAs and accountants and people without a credential. Choose with care. A paid preparer has to sign the return and include a preparer tax identification number. Anyone paid to prepare returns should understand the tax matters on them. The publication points to Tips for Choosing a Tax Preparer on IRS.gov.
SCORE’s checklist says to be ready for three conversations if you use a professional.
- Major shifts in how you operate
- A change in the number of employees
- A sale or a purchase of a large asset
Add the facts the forms need. Employment tax records if you have a payroll. Forms W-2 if you paid wages. The Social Security Administration offers W-2 filing options for people who process those forms. Estimated-tax confirmations. The asset page. The owner contribution and distribution list.
Bench’s tax-season guide says the income tax bill may be federal and state. Franchise tax or an annual report fee may apply. That depends on the structure and the state. If you have employees, you withhold tax from their pay and send it to the IRS and to the state. Do not assume the federal packet is the only packet.
You remain the person who supplies the facts. A preparer cannot reconstruct a mixed bank account from memory. Publication 583 says the records have to be available if the IRS examines the return. A complete set speeds that exam.
How long the folder stays
Organize financial records for taxes and then keep them. Bench’s tax-season guide says the IRS requires you to keep business records for three years and suggests scanning them so a box does not walk off. Publication 583 is the fuller clock. Keep support for an item of income or a deduction until the period of limitations for that return runs out. A return filed early counts as filed on the due date.
| If this is true | Publication 583 says keep the records |
|---|---|
| None of the longer rows apply | 3 years |
| You left out income and it is more than 25 percent of the gross income on the return | 6 years |
| You claim a loss from worthless securities or a bad debt | 7 years |
| You do not file or you file a fraudulent return | No time limit |
| You have employees | Employment tax records for at least 4 years after the tax is due or paid. Use the date that falls second. |
| You own property you have not sold | Until the limitation period ends for the year you dispose of it in a taxable disposition |
SCORE’s article on which tax papers to keep says to hold returns and supporting documents for at least seven years and then read the IRS page for the breakdown. That seven-year habit sits on top of the table. It does not replace the asset rule or the no-limit rows.
A small business tax checklist you can run this week
- Reconcile the business account through the last month of the year. Enter every bank charge.
- Finish the ledger. Pull the income statement and the balance sheet and the general ledger and the trial balance.
- Match income to sales reports and to 1099s and to the payment-platform totals.
- Sort expenses into the SCORE groups. Attach the invoice. Pull sales tax you collected out of income. Leave commuting miles out of the vehicle number.
- List contributions and distributions. On a sole proprietorship or a single-member LLC, keep your own pay out of the expense column.
- List equipment you bought and the date and the cost. Let the preparer test section 179 and depreciation.
- List every estimated payment with the date and the amount. Note the form you used.
- Write three notes for the preparer. What changed in the work. Whether headcount changed. Whether you bought or sold a large asset.
- Confirm the entity’s forms on Publication 583’s table before you file. An LLC uses the column for its election.
- File the packet by year. Keep it for the period in Publication 583’s table. Scan a copy that stays legible.
The books are what make steps 1 through 4 real. QuickBooks Online is one place to keep the year’s transactions and the receipt images together. It does not choose your form and it does not decide that a cost is deductible. You and the preparer do that with the packet.
When the month is reconciled in QuickBooks Online, print the four reports and stop. Get ready for taxes in that order every year. The April appointment reviews a folder you trust.
