It depends on the reason for amending.
You print, sign, date and mail the federal amended return, Form 1040X, and any forms or schedules that changed from the original tax return that you filed.
Also include with the mailed amended return any Forms W-2 or 1099 that were added to the amended return and not included in the original return.
If taxes are owed on the amended return you include a check or money order for the taxes owed with the mailed amended return.
If you are receiving a tax refund from the amended return the IRS will mail you a refund check to the address entered on the amended return.
