Amended returns must be mailed to IRS to be processed.
If you have done that then check the IRS web site: https://sa.www4.irs.gov/wmar/notice;jsessionid=nuN0JsnBAFlfW2fbpXJa9ivW.PP
You cannot e-file an Amended return. For detail on Amended return see below.
https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed
