You can file Form 1040-X, Amended U.S. Individual Income Tax Return electronically with tax filing software to amend tax year 2020 or later Forms 1040 and 1040-SR, and tax year 2021 or later Forms 1040-NR. If amending a prior year return originally filed on paper, then the amended return must also be filed on paper. See Form 1040-X, Amended U.S. Individual Income Tax Return, Frequently Asked Questions for more information. You still have the option to submit a paper version of the Form 1040-X and should follow the instructions for preparing and submitting the paper form.