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How to Catch Up on Unfiled Tax Returns (and When to Call a Lawyer First)

2 min readPublished September 10, 2026Updated September 15, 2026

People who have not filed for a few years usually share two beliefs: that the IRS has forgotten, and that starting will make things worse. Neither is true. The IRS already has most of your income on file, and voluntary filing puts you in a better position than being found. Here is how catching up actually works.

Start with what the IRS already knows

Every W-2, 1099, and broker statement issued to you was also sent to the IRS. A wage and income transcript, which we request with your authorization, lists all of it by year. That transcript is the foundation of every missed return: it shows what has to be reported and, often, what the IRS will eventually assess on its own if you do nothing. It does not include your deductions, your cost basis, or anything the IRS was not told, which is where your own records come in.

How many years to file

IRS policy generally requires the last six years to be considered compliant, though the legal obligation to file never expires. Refunds are only available for three years from the original due date, so older refund years are lost but still need filing. We confirm the exact years from the transcripts and any IRS correspondence.

File in order, and file accurately

Returns are prepared oldest first, because carryovers, losses, and basis flow forward. Each year is reconciled to its transcript so nothing the IRS already has is left off. If the IRS has already filed a substitute return for a year, an accurate original return usually replaces its assessment with a lower one, since substitute returns allow no deductions.

Separate filing from paying

The fear that stops most people is the balance. Filing and paying are different problems. Filing stops the failure-to-file penalty, which is the larger one, and starts the clock on collection limits. What you owe can then be handled through a payment plan or other arrangement. That second problem belongs to the law firm.

When an attorney should lead

Some catch-up situations carry exposure that changes the approach: income that was deliberately left off, foreign accounts that were never disclosed, cash businesses with no records, or a prior IRS contact that went unanswered.

What the process looks like

A confidential consultation, a transcript request, a written scope listing every year to file, returns prepared and reviewed one year at a time, and a plan for anything owed. Most people finish the conversation relieved that the number is smaller and the list is shorter than they imagined. See Back Taxes and Unfiled Returns.

Andrew
Written by

Andrew Gordon

Founder, Gordon Tax and Gordon Law Group · Tax Attorney, CPA

Andrew Gordon is a tax attorney and CPA who founded Gordon Law Group in 2012 and has focused on cryptocurrency tax since an Ethereum developer walked into his office in 2014. He testified before the IRS and Treasury on the rules that became Form 1099-DA, teaches emerging technologies at Chicago-Kent College of Law, and has been quoted on crypto tax by CNBC, Bloomberg, Yahoo Finance, NerdWallet, USA Today, and The Washington Post.

This article is general information about tax and accounting topics and is not advice for your situation. Rules change; check the published and updated dates above and confirm current law before acting. Reading this article or contacting Gordon Tax does not create a client relationship.

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