Can you send an amended tax return electronically?

No, an amended return must be filed on a paper Form 1040X (PDF), Amended U.S. Individual Income Tax Return, and mailed to your servicing center for processing. You may submit the form after the IRS processes your original return.

References:

• Form 1040X Instructions and Form 1040X (PDF), Amended U.S. Individual Income Tax Return and Instructions
• Tax Topic 308, Amended returns