3 days ago, you asked if "e-file be supported". The 1040X must be printed and mailed (IRS requirement). It is scheduled to be released by TurboTax on 2/22/2019. As I noted, it takes time after the government releases the final form for TurboTax to complete its programming and testing. And, as you can imagine, at this time of year, there are thousands of forms from the federal government and the states that all need to be completed and released at the same time.
