This is an early release draft of an IRS tax form, instructions, or publication, which the IRS is providing for your information. Use Form 1065-X, if you are not filing electronically, to: Correct items on a previously filed Form 1065, Form 1065-B, or Form 1066.The purpose of this article is to provide partnerships a guide to the various filing procedures and tax forms to use to modify a previously filed Form 1065. Follow these steps to prepare a 1065 partnership amended return for electronic filing. Note Select the statement window for the Amended return field. Form 1065X is printed and mailed. An amended 1065 (with the amended box checked) can be e-filed. How to Complete an Amended Return. You can file your amended return electronically, or on paper. Complete your amended return as if you are filing the return for the first time.