Introduction
A smooth Form 1040 filing starts with complete records, not a last-minute download of tax forms. Missing a single 1099 or a foreign account statement can turn a simple return into weeks of back-and-forth.
Form 1040 is the U.S. federal individual income tax return. Your checklist depends on the tax year, filing status, income sources and residency.
Australia-based U.S. taxpayers also face a separate Australian return, and the two are not interchangeable. This guide covers 2025 forms and amounts in USD.
We walk through taxpayer details, income, adjustments, deductions, credits, taxes paid, cross-border items, e-filing and record retention.
Key Takeaways
- Gather IDs, dependent details, prior-year returns, income forms and payment records before you start.
- Report all income, including amounts with no W-2 or 1099.
- Separate documents used to prepare the return from those transmitted and those kept.
- Confirm foreign income, foreign tax, account reporting and residency rules before you file.
Start with Personal, Family, and Filing Information
Personal identification and household information
Collect these for yourself, your spouse and each dependent:
- Legal name, SSN or ITIN, date of birth and current address (including foreign-address details)
- Filing status: single, married filing jointly, married filing separately, head of household or qualifying surviving spouse
- Any IRS Identity Protection PIN, which is separate from e-file authentication
- Dependent relationship, residency, student, disability and custody information
Note any change during the year, such as marriage, divorce, a birth, a move or a name change. These events can alter your filing status or credits and require supporting records.
Prior-year and payment details
Keep last year's federal and state returns handy. They show carryforwards, depreciation, capital losses and estimated payments that roll forward.
E-filers also need identity validation. The IRS asks for your original prior-year AGI (not from an amended return) or a prior-year self-selected PIN. If you did not file last year, enter 0.
Also gather bank account and routing numbers for refunds or payments, plus any IRS or state notices received during the year.
Gather Income Documents for Form 1040
Employment, retirement, and government benefits
Collect every W-2 and compare each against your final pay stub for missing wages, tips or withholding. Then add:
- Form 1099-R for pensions, annuities and retirement distributions
- SSA-1099 or RRB-1099 for Social Security and railroad retirement benefits
- Form 1099-G for unemployment compensation
For 2025, Schedule 1-A offers deductions for qualified tips (up to $25,000) and qualified overtime (up to $12,500, or $25,000 jointly), subject to income limits. The overtime deduction generally covers only the premium portion.
These are deductions, so the income itself still appears on your return. Keep tip logs, W-2 box 7 and any Form 4137 data.
Self-employment, gig, and contract income
Gather 1099-NEC, 1099-K and 1099-MISC forms, plus invoices, platform reports and bank deposits for income with no form. Prepare a year-end profit-and-loss summary and organise:
- Expense receipts and mileage logs
- Home-office details and inventory records
- Asset purchases and estimated tax payments
For 2025, third-party settlement organisations generally issue Form 1099-K when payments exceed $20,000 and 200 transactions, per the IRS 1099-K FAQs. Payment-card transactions have no minimum. That threshold governs the form, not whether income is taxable.
If a form is missing or wrong: Income is still reportable. Ask the employer or payer for a corrected form.
If a W-2 is still wrong at the end of February, call the IRS at 800-829-1040 (a U.S. number). Form 4852 substitutes only for a W-2 or 1099-R. If a later form shows different figures, you may need Form 1040-X.
Investment, digital asset, and property income
- Forms 1099-INT, 1099-DIV and 1099-B, with acquisition dates, cost basis and reinvested distributions
- Digital-asset transaction histories and basis records. Form 1040 asks the digital-asset question even without a Form 1099-DA
- Records for rental income, royalties, prizes and gambling winnings
- For property sales or rentals: closing statements, improvement records, depreciation schedules, rental days, expenses and Forms 1099-S
Form 8949 reconciles sales with Schedule D.
Pass-through and other income
Get Schedule K-1 forms from partnerships, S corporations, trusts or estates, and reconcile them with basis and prior-year records. Also gather:
- Scholarships and alimony
- State tax refunds and jury pay
- Foreign income
Finish with a reconciliation. Compare tax forms, platform reports, bank deposits and last year's return. Investigate anything missing or counted twice.
Collect Deductions, Credits, and Tax-Payment Records
Adjustments and above-the-line deductions
Gather records for:
- Deductible IRA contributions
- HSA contributions (Form 8889)
- Student loan interest (Form 1098-E)
- Self-employed health insurance
Self-employed filers should keep health insurance, retirement, vehicle and home-office records in separate folders.
Standard versus itemised deductions
The 2025 base standard deductions are:
| Filing status | Base amount |
|---|---|
| Single / married filing separately | $15,750 |
| Head of household | $23,625 |
| Married filing jointly / qualifying surviving spouse | $31,500 |
Only gather itemising records if they might beat these figures:
- Form 1098 and mortgage interest
- Property and other deductible taxes
- Medical and dental costs
- Charitable receipts
Charitable rules for 2025:
- Gifts of $250 or more need a written acknowledgement from the charity
- Noncash gifts over $500 generally need Form 8283
- Over $5,000 generally requires a qualified appraisal, with exceptions
Tax credit documentation
- Child Tax Credit: qualifying-child details and valid SSNs (Schedule 8812)
- Earned Income Tax Credit: income records and valid SSNs. Form 2555 filers cannot claim it
- Child and dependent care: provider name, address and TIN (Form 2441)
- Education: Form 1098-T and qualified-expense receipts
- Premium Tax Credit: Form 1095-A, reconciled on Form 8962
- Saver's Credit: retirement contribution records (Form 8880)
Eligibility and income limits vary, so check each credit against current IRS instructions.
Taxes already paid
Total these amounts:
- Withholding on W-2s and 1099s
- 2025 estimated payments
- Any 2024 overpayment applied forward
- Extension payments
Your IRS Online Account shows up to five years of payment history. Compare it to your records and resolve discrepancies before filing.
Always check the current Form 1040 instructions. Older checklists may carry outdated thresholds and credit rules.
Prepare for Special Circumstances and International Filings
U.S. taxpayers living or earning income in Australia
U.S. citizens and resident aliens report worldwide income wherever they live. For Australia-based filers, gather:
- Australian wages, pension, investment, rental and business income records
- Tax assessments and payment confirmations
- Exchange-rate records, since return amounts are stated in USD
Two common forms apply:
- Form 2555 (foreign earned income exclusion): up to $130,000 for 2025; needs a foreign tax home and bona fide residence or 330 full days in 12 consecutive months abroad
- Form 1116: claims credit for foreign tax, but not on income you excluded
The Australian return is a separate filing. This guide covers U.S. obligations only and is not Australian tax advice. The U.S.-Australia treaty generally preserves U.S. taxation of citizens through its saving clause. Superannuation treatment also varies by fund structure, so get specialist advice.
Qualifying taxpayers abroad get an automatic extension to June 15, but IRS guidance for taxpayers abroad confirms interest on unpaid tax runs from April 15.
Foreign financial accounts and assets
Record each institution's name, country, account number, ownership and statements, plus the highest balance. Two separate reports may apply:
- FBAR (FinCEN Form 114): aggregate foreign accounts over $10,000 at any time. Filed separately by April 15, with automatic extension to October 15
- Form 8938: attached to your return. Thresholds for those qualifying as abroad start at $200,000 at year-end (unmarried) or $400,000 (joint)
One does not replace the other.
Is Form 1040 the right return?
Review citizenship, residency, treaty position, visa status and days in the U.S. Resident-alien status follows the green card or substantial presence test (31 current-year days and 183 weighted days). Living abroad alone does not make you a nonresident.
Form 1040-NR, dual-status returns, expatriation, treaty claims and foreign businesses call for specialist review.
Major life events and IRS correspondence
Collect supporting documents for any of the following:
- Marriage, divorce, birth, adoption, death, custody or relocation
- IRS, state or foreign tax notices
- Wage-and-income transcripts
- Identity-theft paperwork (Form 14039)
VJM Global prepares Form 1040 and 1040-NR returns through U.S.-compliant professionals and can help with cross-border documentation. Not every situation is covered, and Australian filings are outside this scope.
Complete the Final Review, E-File, and Recordkeeping Checklist
Final accuracy review
- Tie every W-2, 1099, K-1, brokerage and foreign statement to the return
- Check names, TINs, filing status, dependents, bank details and arithmetic
- Confirm carryforwards, withholding and estimated payments
- Resolve missing forms and unsupported deductions rather than guessing
E-filing and attachments
Source documents used to prepare the return are not automatically transmitted with the e-file.
- Self-select PINs and Form 8879 serve as e-signature methods
- The preparer must hold signed authorisation before transmitting
- Form 8453 covers only its listed paper documents, not W-2 or 1099-R copies
On paper returns, attach W-2s, plus W-2G and 1099-R if tax was withheld. You do not need every 1099.
Save the acceptance confirmation, payment confirmation, refund details and a full copy of the return. A rejected return is not considered filed.
Records for audits and compliance reviews
Keep the filed return, schedules, source forms, receipts, statements, foreign-account records, payment proof and correspondence. IRS retention guidance gives these periods:
| Circumstance | Period |
|---|---|
| General rule | 3 years |
| Income omitted exceeds 25% of gross income | 6 years |
| Bad-debt or worthless-securities claim | 7 years |
| Fraud or no return filed | Indefinitely |
| Property | Until the limitation period ends for the year of disposal |
Use encrypted storage, restricted access and consistent file names. Share sensitive records with a preparer only through secure channels.
Frequently Asked Questions
What documents do I need for 1040 tax preparation?
You need ID and SSN/ITIN details, last year's return, income forms, deduction and credit records, and payment evidence. Add foreign account and self-employment records if they apply.
What information do I need to include on my 1040 tax return?
Filing status, taxpayer and dependent details, all income, adjustments, deductions, credits, taxes paid, refund or payment details and required schedules.
What documents should I include with my 1040 tax return?
Attachments depend on the schedules and claims you make. On paper, attach W-2s and any W-2G or 1099-R with withholding. Check current IRS instructions.
What documents do I need to submit when e-filing my 1040?
Only prescribed PDF attachments and forms like Form 8453 (when required) are transmitted. Other records stay with you. Keep your e-file authorisation and acceptance record.
What documents should I keep for a tax audit or compliance review?
Keep the filed return, schedules, source forms, receipts, payment records, ownership and legal documents, foreign-account information and correspondence in secure storage.
