We ask clients to send every tax form they received for the year because a tax return is only as complete as the document set behind it. In practice, that means all W-2s, 1099s, 1042-S forms, and any other tax forms issued by people or companies that paid you. A missing form can cause income mismatches, state withholding mismatches, omitted credits, and IRS or state notices after filing.

The IRS uses information returns to match what payors reported to what taxpayers report on their returns. When a taxpayer omits a form entirely, the risk isn’t just that income is understated. Sometimes withholding is lost, state allocation is lost, or the category of income is misunderstood. For example, wages reported on Form W-2, nonemployee compensation reported on Form 1099, and foreign-payor or withholding information reported on Form 1042-S can each affect the return differently.

Our request becomes even more important when a client works through agencies, managers, or intermediaries. In those situations, the tax forms alone may not tell the full story. An agency year-end statement can show gross commissions, deductions withheld by the agency, expenses charged back, taxes withheld, and the net amount actually remitted. That supplemental statement often helps us reconcile why the amounts on the tax forms don’t line up neatly with the deposits that hit the client’s bank account during the year.

This is especially important for clients in industries where gross earnings and net pay differ significantly because commissions, management fees, travel advances, wardrobe charges, or other expenses were withheld before payment. Without the agency statement, it’s easy to misread the tax form and either omit income, double-count deductions, or fail to identify amounts already accounted for through the agency.

Asking for all forms also helps us catch timing issues. Sometimes a client assumes a form is missing because the payment felt small or because it arrived late. Sometimes a form exists electronically but was never downloaded. If we only receive a partial set of documents, the return may look complete to the client but still be incomplete from a filing perspective.

This document request also protects the client in the event of a notice. If the IRS later questions whether a form was included, the preparer’s ability to trace the return back to the actual documents is important. The goal isn’t only to file correctly, but to be able to show why the return was prepared the way it was.

The easiest way to help on this item is to gather your forms by payor and send the full set, even if you think some are duplicates or irrelevant. If an agency paid you, include the agency statement as well. If you later receive a corrected form, send that too. It’s better for us to sort out which version controls than to work from an incomplete set.

In short, we ask for all tax forms and agency year-end statements because information returns are the backbone of return preparation, and agency summaries often provide the context that tax forms alone don’t. Complete documents help us reconcile income, withholding, commissions, and deductions properly and reduce the risk of mismatches after filing.