Amended returns can only be mailed. It is suggested that it be mailed certified with return receipt (or other tracking service) to verify that the IRS receives it.
See Internal Revenue Bulletin: 2011-40 https://www.irs.gov/irb/2011-40_IRB/ar10.html
"Other than direct proof of actual delivery, proof of proper use of registered or certified mail, and proof of proper use of a duly designated PDS as provided for by paragraph (e)(2)(ii) of this section, are the exclusive means to establish prima facie evidence of delivery of a document to the agency, officer, or office with which the document is required to be filed. No other evidence of a postmark or of mailing will be prima facie evidence of delivery or raise a presumption that the document was delivered."
You can check the status of the amended return here, but allow 3 weeks after mailing.
If you already went through the amendment interview, then you just need to print it out & mail it in. Mail in the amended return & any forms or schedules that changed due to the amendment (ex. W2, 1099, Schedule A etc)How do I print my amended return if I've closed out of it?
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