What is a form 1040X?

Answer by  Kristine (145)

1040X is a form to file an amended tax return if you need to make changes on a tax return (1040) that has already been filed. Generally you need to file the 1040 within 3 years of when you filed the original 1040

Answer by  Chaneygirl (1755)

It is an amended tax return. You file it when you need to make a change to a prior year return that has already been filed and you've found errors.

Answer by  labgirl (333)

1040x is the form used to file an amended tax return. If you discover an error on your tax return after it is filed, you fill this out.