A tax preparation checklist for the preparer is a short set of gates to clear before entering the first form. Confirm the client's identity details and IP PIN, pull every carryover from last year's return, verify estimated payments and refund details, settle filing status and dependents, and check that no expected document is still outstanding.
What belongs on a preparer's tax preparation checklist?
A preparer's tax preparation checklist holds the gates between receiving a client's documents and starting data entry. Each gate is a yes or no question with a sign-off: identity confirmed, documents complete against the expected list, carryovers pulled, payments verified, refund details current, filing status and dependents settled. Entry starts only when every gate is signed.
This is a different list from the one the client sees. The client's checklist asks for documents. The preparer's checklist asks whether the documents, and the facts around them, are good enough to build a return on. A folder can be full and still fail a gate, for example when it holds last year's 1098 instead of this year's.
The gates are worth writing down because each one, missed, causes rework later. A return entered before a carryover is pulled has to be reopened. A return entered with the wrong filing status has to be rebuilt. A return entered before a K-1 arrives has to be redone when it does.
Six gates cover most individual returns:
- Identity: names, Social Security numbers and dates of birth match the cards, and any IP PIN is this year's.
- Documents complete: every line on the client's expected-documents list is received or marked not applicable.
- Carryovers: amounts carried from last year are pulled and noted.
- Payments: estimated payments and any prior-year overpayment applied are confirmed.
- Refund or balance due: bank details for a refund or payment are current.
- Status and dependents: filing status and each dependent are settled.
The expected-documents list in gate 2 should come from last year's return; how to build a tax checklist from last year's return shows that process.
The identity gate has one detail that changes every year. The IRS page on getting an identity protection PIN says an IP PIN is valid for one calendar year and a new one is generated each year. A number copied from last year's file will not work.
Prior-year carryovers on the tax preparation checklist
Prior-year carryovers are amounts a client could not fully use last year that move forward to this year's return. The common ones for individuals are capital losses, excess charitable contributions, net operating losses, suspended passive losses and depreciation on assets already in service. Each one is read from last year's return or worksheets, not from a document the client sends.
That is why carryovers belong on the preparer's list. No payer mails a form for them, and a client will rarely mention them. If the firm did not prepare last year's return, getting the complete prior return, including worksheets, is part of this gate.
Where each carryover comes from:
- Capital loss: the IRS Instructions for Schedule D limit the deduction to capital gains plus $3,000 ($1,500 if married filing separately) and provide a Capital Loss Carryover Worksheet that draws on last year's Schedule D and Form 1040.
- Charitable contributions: IRS Publication 526 says excess contributions can generally be deducted in each of the next 5 years until used up.
- Passive losses: the IRS Instructions for Form 8582 say prior-year unallowed losses are found in column (c) of Part VIII of last year's Form 8582.
- Depreciation: the IRS Instructions for Form 4562 use line 10 for a section 179 deduction carried over from last year and line 17 for MACRS depreciation on property placed in service in earlier years.
New clients need extra care at this gate. A client who switched firms may hand over only the two-page Form 1040, without Schedule D, Form 8582 or the depreciation detail behind Schedule E. Those attachments are where the carryover figures live. Ask for the complete return as filed, including every schedule, form and worksheet, and note on the checklist which pieces arrived. If the previous preparer kept the worksheets, the client can usually request a copy from them.
Carryovers also run out. A charitable carryover from five years ago may be in its last year, and a capital loss carryover shrinks as gains absorb it. Record the original year next to each amount so the next preparer can see how much life is left.
The sign-off for this gate is a short note of each carryover and its amount, with the source line. A blank note with "none" written in is still a sign-off, and it tells the reviewer someone looked.
Estimated payments and refund details to confirm in tax preparation
Estimated payments are tax a client paid during the year, outside withholding, usually in quarterly installments. Refund details are the bank routing and account numbers for a direct deposit. Both change from year to year, and both cause notices or delays when they are wrong, so confirm each before entry rather than copying last year's figures.
The IRS estimated taxes page divides the year into four payment periods, each with its own due date. Ask the client for the date and amount of every payment, and compare those against what the client's bank or IRS online account shows. Clients often remember the payments they scheduled and forget one they made late.
Prior-year overpayment applied is the second half of this gate. The IRS Instructions for Form 1040 say the estimated payments line includes any overpayment applied from the prior-year return or an amended return. Read last year's return for the amount the client chose to apply, and add it to the payments list. The same instructions ask for the former spouse's Social Security number when a client divorced during the year and made joint estimated payments with that spouse.
Refund details are the third. The IRS page on direct deposit of refunds says a refund can go into one, two or three accounts, each identified by routing and account number, and Form 8888 splits a refund on a paper return. A client who closed the account used last year needs to say so before the return goes out.
Filing status and dependents checks in tax preparation
Filing status and dependents are settled by facts about the client's household on specific dates, so they belong before entry, not during it. Filing status is one of five categories. A dependent is a qualifying child or qualifying relative who meets a set of tests. Both decide which forms, credits and lines apply to everything entered afterwards.
IRS Publication 501 lists the five filing statuses: single, married filing jointly, married filing separately, head of household and qualifying surviving spouse. It says marital status is determined at the end of the tax year, which is December 31 for most taxpayers. A client married on December 30 is married for the whole year.
Publication 501 lists tests for a qualifying child (relationship, age, residency, support and joint return) and a qualifying relative (member of household or relationship, gross income, support, and not a qualifying child). The preparer's job at this gate is to collect the facts the tests need, not to apply them from memory.
The facts to collect are concrete. The IRS Form 13614-C intake sheet, used by volunteer preparers, is a good model. It asks for marital status as of December 31, whether a married couple lived apart for the last six months of the year, and for each person in the household: date of birth, relationship, months lived in the home, student and disability status, and who provided support.
Ask these as plain questions. "How many months did your daughter live with you this year?" gets a number. "Does she meet the residency test?" gets a guess.
When is a tax preparation checklist not ready to start?
A tax preparation checklist is not ready to start when any gate depends on a document or fact still outstanding. The common stoppers are an expected Schedule K-1, a corrected 1099 or W-2c the client has mentioned, a Form 1095-A for marketplace coverage, an unconfirmed estimated payment, or a household fact that changes filing status.
K-1s are the most frequent. The IRS Instructions for Form 1065 set March 15 as a calendar-year partnership's return due date, and a partnership can extend with Form 7004. If last year's return had a K-1 and this year's has not arrived, the documents gate is not signed.
Corrections are the second. A W-2c, described in the IRS General Instructions for Forms W-2 and W-3 as a corrected wage and tax statement, replaces figures on the original. If a client says a corrected form is coming, entering the original means entering it twice.
Form 1095-A is the third. The IRS health care information forms page says a client expecting one should wait to file until it arrives, because it feeds Form 8962.
Some firms start entry on the parts that are complete and park the return. That works if the parked return is visible on a list and does not drift into review. Chasing the late K-1s and corrected forms is covered in the missing documents category. Schema CPA helps at gate 2 by checking each client's folder against last year's documents and flagging what has not come in, as the workflow section of the homepage shows.
A one-page preparer checklist
This example is for a fictional client, Dana Ortiz, prepared by a fictional firm, Example Tax Partners. Amounts and account digits are made up for the example.
| Gate | What to confirm | Example note | Sign-off |
|---|---|---|---|
| Identity | Names, SSNs, birth dates match cards; IP PIN is this year's | IP PIN received Jan 20 | ☐ initials, date |
| Documents complete | Every expected line received or not applicable | 13 of 14 received; K-1 outstanding | ☐ initials, date |
| Carryovers | Capital loss, charitable, NOL, passive, depreciation | Capital loss carryover $4,200 (example), from last year's worksheet | ☐ initials, date |
| Payments | Each estimated payment and prior-year overpayment applied | Four payments of $1,500 (example) plus $310 applied | ☐ initials, date |
| Refund details | Routing and account number current | Checking ending XXXX-4821 confirmed | ☐ initials, date |
| Status and dependents | Marital status at Dec 31; each dependent's facts collected | Married filing jointly; one child, 12 months in home | ☐ initials, date |
| Ready for entry | All gates signed | Waiting on K-1 | ☐ initials, date |
After entry, the return gets its own review against the source documents; tying source documents to the tax return covers that step. To gather many of these facts from the client in one pass, see what a tax organizer is. The wider season, from intake to review, is in the tax season workflow category.