If you electronically filed your amended return, you should have received an email letting you know whether it was accepted or rejected. If it was accepted, you do not need to refile the amended return. If it was rejected, then your amended return was never filed and you can proceed through the file screens again.
Please see how do I check my e-file status as well as where's my amended return to check the status of your federal amended return directly with the IRS.
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