Amended returns (Form 1040X) must be filed by mail. They take about 4 months to process, and any refund comes in a paper check from the IRS.
https://www.irs.gov/filing/wheres-my-amended-return
https://www.irs.gov/filing/amended-return-frequently-asked-questions
Or are you asking about a rejected return that you fixed and resubmitted?
