I am a F1 student I already filled my refund using TurboTax and my tax status is showing "accepted" but how can I fill my amended return? Any help will be appreciated.

I am a F1 student I have already filled my refund using Turbotax and my tax status is showing "accepted" but I heard I need to fill the 1040NR form not 1040 NR. When I go to amend my return then I see from TurboTax that "You're going to have to wait until the tax form for amending a return (Form 1040X) is ready for processing. Form 1040X will be ready on 02/22/2019." What should I do now and how can I fill my amended return? I also got my state refund from Oklahoma. Do I need to amend it as well?