You did not amend the tax return. You added the 1099-R to your original return and the return cannot be e-filed again. Remove your changes and wait for the the federal amended tax return, Form 1040X, to be available and wait for the tax refund to be issued before amending. Amended tax returns can only be printed, signed, dated and mailed to the IRS by you, they cannot be e-filed.
See this TurboTax support FAQ for amending a return - https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed
Amend a return - https://ttlc.intuit.com/questions/2566895-what-does-it-mean-to-amend-a-return
