Amended Return

I electronically submitted a Federal return  1041 on 3/6/22 for a trust and then found out a day later that the 1099R was incorrect and the company is issuing me a  new one in 3-5 business days.  I tried to go into TT to amend the return since I already know the amended amount and it said I already filed and there was nothing to file at this time.   How do I electronically file an amended federal return - 1041 ?   I clicked on amended return but that did not seem to make a difference.  Thanks