When dealing with an old tax return, sometimes people wonder just how long the IRS has to come after them for the tax.  Sometimes people want to know how long they have to claim their refund.  Other times people want to know what happens if there was a mistake.  The short answer? It all depends.

Filed Tax Returns:

Deadline for Assessment
Generally, the statute of limitations for the IRS to assess taxes on a taxpayer expires three (3) years from the due date of the return or the date on which it was filed, whichever is later.

However, the IRS h