You will need to file an amended tax return if you discover that you accidentally left out information, made an error in math or used the wrong codes on your original return. Here is How to Amend a Tax Return on TurboTax:
Amend your tax returns as soon as you realize there is an error or omission on your original return. If you wait too long, you may not be allowed to file an amendment. In addition, the IRS may assess penalties and interest charges if they think you are failing to report additional income or rebating taxes you should have withheld on a payment.
Prior to the Due Date
You can file a superseding return if you need to change your return before the original due date. This is done by attaching a copy of the amended form, along with … Read the rest