How long does the IRS typically have to propose amendments to a tax return?

The IRS typically has three years from the date the tax return was filed to propose amendments or make adjustments. This period, often referred to as the "statute of limitations," allows both taxpayers and the IRS a reasonable timeframe to review and challenge tax returns and any discrepancies that might arise. During this time, the IRS can audit tax returns, request additional information, or propose changes if they find errors or omissions.

It's important to note that if a taxpayer substantially underreports their income or if there is fraud involved, the time limit may extend beyond three years. However, in standard circumstances where no special issues are present, three years is the established timeframe for the IRS to act on tax returns.