

These will be automatically corrected by IRS computers, followed by a notification of the change sent by mail. You don't have to amend your return if you discover that you made a simple math error. Fixing such errors now by filing an amended may avoid all or some fines, interest, and penalties. However, the IRS is sure to catch some types of errors – for example, failing to include income reported to the IRS on a Form 1099. You have no obligation to report them to the IRS by filing an amended return. It's up to the IRS to catch such mistakes. This is so even if you later discover you underpaid your taxes due to mistakes in your filed return. You never have to amend a tax return you've filed with the IRS. When should you file an amended tax return? But first, make sure you really want to do so.

Here's a taxpayer's worst nightmare: Discovering you made a mistake on a tax return you’ve already filed with the IRS.
