People who owe the IRS usually know it. People with unfiled returns often are not sure how many years are missing.
That second group has the harder problem. An unfiled year does not just sit there. It blocks other things from working.
Two penalties run at once, and they are not the same size.
Failure to file costs 5% of the unpaid tax per month, capped at 25%. Failure to pay costs one half of one percent per month, also capped at 25%. Interest runs on top of both.
The gap is the point. Not filing costs ten times what not paying costs. Filing a return you cannot pay is almost always better than filing nothing at all.
If you do not file, the IRS eventually will. It is called a substitute for return.
The IRS builds it from what other people reported about you. W-2s. 1099s. Broker statements. What it leaves out is everything that helps you: deductions, credits, a better filing status, and your actual cost basis on anything you sold.
The result is a bill that is almost always larger than what you really owed. You can still file your own return afterward to correct it, and the IRS will generally adjust the account.
Here is the part that surprises people.
Tax on a year you never filed can never be discharged. Not in three years, not in thirty. The clock never starts.
Worse, a substitute return does not fix that. Most courts hold that an IRS prepared return is not your return for discharge purposes. The two year test that applies to late filed returns never begins to run.
So a case built to wipe out old tax can fail on a single missing year. Anyone seeking help with tax debt in bankruptcy should expect the first question to be about which returns are actually on file.
A Chapter 13 plan cannot be confirmed while required returns are missing. The court and the trustee both check.
Filing a case with gaps leads to one of two outcomes. Either the case stalls while you scramble to file old returns, or it gets dismissed and you start over.
There is a deadline on money owed to you, not just on money you owe.
A refund has to be claimed within three years of the return’s due date. After that it is gone. It stays with the government rather than moving to your balance on another year.
People with several unfiled years are often owed money on some of them. Every year that passes turns a possible refund into nothing.
You do not need shoeboxes of paper. The IRS has most of it already.
Wage and income transcripts show what employers and banks reported for each year. Account transcripts show payments, credits, and what has already been assessed. Together they let a return get rebuilt for a year where you have nothing left.
Missing records slow this down. They rarely stop it.
The IRS publishes clear guidance on filing past due tax returns, including where to send them and what to do if you cannot pay. It is worth reading before you talk to anyone who wants to charge you for the same information.
Then work in this order:
Unfiled returns are not a tax problem you can wait out. They are the thing standing between you and every option that would otherwise be open.
Get current first. The rest gets much easier after that.