How far back can the IRS go to audit my return?
Generally, the IRS can include returns filed within the last three years in an audit. If we identify a substantial error, we may add additional years. We usually don’t go back more than the last six years.
AUDIT
This is from the ABA:
1. The IRS Typically Has Three Years. The overarching federal tax statute of limitations runs three years after you file your tax return. If your tax return is due April 15, but you file early, the statute runs exactly three years after the due date, not the filing date. If you get an extension to October 15, your three years runs from then. On the other hand, if you file late and do not have an extension, the statute runs three years following your actual (late) filing date. There are many exceptions discussed below that give the IRS six years or longer, however.
2. Six Years for Large Understatements of Income. The statute of limitations is six years if your return includes a “substantial understatement of income.” Generally, this means that you have left off more than 25 percent of your gross income. Suppose that you earned $200,000 but only reported $140,000. Given that you omitted more than 25 percent, you can be audited for up to six years. Maybe this understatement was unintentional or you reported in reliance on a good argument that the extra $60,000 was not your income. The six-year statute applies, but be aware that the IRS could argue that your $60,000 omission was fraudulent. If so, the IRS gets an unlimited number of years to audit. What about not an omission of income, but overstated deductions on your return? The six-year statute of limitations does not apply if the underpayment of tax was due to the overstatement of deductions or credits.
