Let the IRS Correct Certain Errors
You don’t need to file an amended return if you discover a simple math or clerical error on your return. The IRS can correct those types of mistakes on its own. An amended return isn’t necessary if you forgot to attach a certain form or schedule to your return, either.
The IRS will contact you by mail if they need additional information to fix these types of errors. However, you should file an amended return if there’s an issue that changes your filing status, income, deductions or credits.
