What documents are needed for a tax return
Updated: 2026
Careful preparation requires more than income forms. Credits, dependents, mileage, business expenses, foreign income, and foreign accounts may require supporting documents.
Why supporting records matter
Some items on a tax return cannot be claimed based only on a client’s verbal statement. If the situation affects dependents, Child Tax Credit, Earned Income Credit, Head of Household, business expenses, mileage, foreign income, or foreign accounts, we may ask for records that support the facts of the year.
This is not just paperwork. Supporting records help prepare the return correctly, reduce the risk of errors, and protect the client if the IRS or a state tax agency later asks questions.
Income
Gather W-2, 1099-NEC, 1099-MISC, 1099-K, 1099-INT, 1099-DIV, 1099-B, pension documents, benefit statements, rental records, and other income records.
If forms have not arrived yet, it is usually better not to file too early. First, identify which documents are expected and which income items must be reported.
Children, dependents, and credits
If children or dependents are claimed, it is important to confirm not only SSN / ITIN and relationship, but also the facts of the year: where the child lived, how long the child lived with the taxpayer, who provided support, and whether there were periods of residence outside the United States.
These situations may require school records, medical records, childcare records, travel dates, custody/support facts, Form 8332, or other documents. For example, if a family lives between two countries and children spent a significant part of the year outside the U.S., this may affect eligibility for certain credits.
Business expenses, mileage, and vehicle use
Self-employed / Schedule C work requires income records and expenses by category, not only rough estimates. For expenses, receipts, invoices, statements, and a clear business purpose are often important.
If business use of a car or mileage is claimed, a mileage log, dates and purposes of trips, business miles, total miles, and odometer readings at the beginning and end of the year are important. Without these records, mileage and vehicle expenses may not be sufficiently supported.
Foreign income, accounts, and two-country life
If there was income outside the U.S., foreign bank or investment accounts, documents from another country, periods of residence outside the U.S., or frequent travel between countries, this should be discussed before filing.
Useful records include foreign income documents, foreign tax paid, foreign account statements, travel dates, country-of-residence details, and documents that help determine tax residency and reporting requirements.
Secure transmission
Do not send SSN, W-2, 1099, ID copies, bank records, or tax documents through the regular contact form or regular email.
After the initial contact, we will explain the secure method for transmitting documents.