After you file

An amended Federal tax return, Form 1040X, can only be completed, printed, signed, dated and mailed by you.  It cannot be e-filed.  The IRS will take 16 weeks or longer to the process the amended tax return.

Do you need to make changes to the tax return that was already filed and where you have not yet received the tax refund or the taxes owed have not yet been paid since the IRS has not yet processed the tax return that has been filed.