The documents you need for tax season

Tax season goes badly for one reason more than any other: the documents are scattered, and you go looking for them in April. Here’s the plain checklist of what to gather (proof of income, proof of deductions, your personal info, and the records that back it all up) and how to have it ready before you need it. This is general guidance, not tax advice.

8 min read · Updated 2026-06-20

Proof of income

Start here, because the income documents are the ones the IRS already has copies of, which means they’re the ones a mismatch shows up on fastest. You want every form that reports money coming in:

W-2from each employer you worked for during the year. Your final pay stub of the year previews this form, so it’s worth knowing how to read a pay stub and checking its year-to-date totals against the W-2 before you file. Once the W-2 arrives, our guide to reading a W-2 box by box covers what every figure means.
1099-NEC for freelance and contractor income, plus 1099-MISC, 1099-K, 1099-INT, 1099-DIV, and 1099-B for other income, interest, dividends, and investment sales. How to read a 1099 walks through which form is which and where each one lands on your return.
K-1s if you’re a partner, S-corp shareholder, or trust beneficiary, and SSA-1099 for Social Security benefits.

The trap with income documents is that they arrive on different schedules through January and February, from employers, banks, brokerages, and platforms. The one you forget is usually the late-arriving 1099 from an account you barely use, and it’s exactly the kind of omission that triggers a notice later.

Proof of deductions and credits

This is the bucket that actually saves you money, and the one people are least prepared for, because the proof is spread across a year of ordinary life. Whether you itemize or take the standard deduction, gather what applies:

Form 1098 for mortgage interest, and 1098-E for student loan interest, 1098-T for tuition.
Charitable donation receipts and written acknowledgments for larger gifts.
Medical and dental bills you paid out of pocket, and HSA or FSA contribution and distribution records.
Childcare costswith the provider’s tax ID, and records for any energy, education, or other credits you plan to claim.
If you’re self-employed: business expense receipts, mileage logs, and home-office details.

Personal info and last year’s return

The boring-but-essential set. You need Social Security numbers (or ITINs) for yourself, your spouse, and every dependent, a bank account and routing number for direct deposit of any refund, and a copy of last year’s Form 1040.

The prior return matters more than people expect: it carries forward figures like capital-loss carryovers and prior depreciation, and many e-filing systems ask for your previous-year adjusted gross income just to confirm it’s really you. If you can never find last year’s return when you need it, that’s a sign your filing system needs work, not your memory.

What an audit actually asks for

An audit sounds dramatic, but at its core it’s a request to prove the numbers you already put on your return.The IRS isn’t asking for everything you own; it’s asking for the evidence behind specific line items: the receipts behind a deduction, the statements behind reported income, the mileage log behind a vehicle expense, the acknowledgment letter behind a charitable gift.

That’s why the documents in the sections above are the same documents that protect you in an audit. The return is the claim; these are the proof. The IRS can generally look back three years from when you filed, extending to six years if income was substantially underreported, which is the reasoning behind the common advice to keep tax records for about seven years. Our guide on how long to keep important documents breaks down the full retention table. The practical takeaway: don’t throw away the supporting documents the moment you’ve filed, because the proof is only valuable if you can still produce it years later.

How to have it ready without the scramble

The checklist above isn’t hard to understand. It’s hard to assemble, because the documents arrive across twelve months from a dozen sources and you only go looking for them once a year, under time pressure. The fix isn’t a better April; it’s filing each document the moment it shows up, so the folder is already complete when you sit down.

That’s the part Granite is built to do for you. Drop in a W-2 or a 1099 when it arrives and it’s read, recognized, and sorted into the right tax year automatically, so “Tax 2026” quietly fills itself in. Because Granite knows which documents a tax year usually contains, it can also flag when a year looks thin, which is how you catch the missing 1099 in February instead of discovering it after you file. If you run a business, that year-round organization is the whole game; see Granite for small business.

One honest note: Granite organizes your documents and tracks their dates. It doesn’t give tax advice or file your return, and the high-stakes calls still belong with a tax professional. What it removes is the annual scavenger hunt. It’s free for your first 25 documents, which is enough to cover a typical year’s tax paperwork.

Tax documents, answered

What documents do I need to file my taxes?

At a minimum: proof of income (W-2s from employers, 1099s for freelance, interest, dividends, and other income, plus K-1s and SSA-1099 if they apply), records that support your deductions and credits (mortgage interest on Form 1098, charitable receipts, medical bills, student loan interest on 1098-E, childcare costs, and HSA contributions), your personal information (Social Security numbers for everyone on the return and a bank account for direct deposit), and last year’s tax return for reference. Exactly which apply depends on your situation; this is general guidance, not tax advice.

What do I need to bring to a tax appointment or send my accountant?

Bring everything that reports income (all W-2s and 1099s), everything that supports a deduction or credit (receipts, 1098 mortgage-interest and tuition statements, charitable-donation records, medical bills, childcare totals), proof of identity and Social Security numbers for everyone on the return, your bank details for any refund, and a copy of last year’s return so your preparer can carry forward anything relevant. Having it all in one place beforehand is the single biggest time-saver, for you and for them.

What documents do I need to keep in case of an audit?

Keep the records that prove the numbers on your return: the income statements (W-2s, 1099s), and the evidence behind every deduction and credit you claimed, meaning receipts, canceled checks or bank and card statements, mileage logs, charitable-donation acknowledgments, and medical or business expense records. The IRS can generally audit a return for three years after you file, stretching to six years if income was significantly underreported, so keeping the supporting documents for about seven years comfortably covers the practical worst case. This is general guidance, not tax advice.

How long should I keep my tax documents?

About seven years for a return and the documents that support it is the common, conservative answer, long enough to cover the IRS’s extended audit window. Many people keep the returns themselves indefinitely (they take almost no space as scans) and only shred the bulky supporting receipts and statements after seven years. Records tied to property or investment cost basis should be kept until well after you sell the asset. See our full guide on how long to keep important documents for the complete table.

Do I need my previous year’s tax return to file?

You don’t strictly need it, but it makes filing much easier and more accurate. Last year’s return carries forward useful figures (prior adjusted gross income, capital loss carryovers, depreciation, state refund details) and some e-filing systems ask for your prior-year AGI to verify your identity. Keep a copy of every year’s filed return where you can find it quickly; it’s one of the documents you’ll reach for most often.