Thank you Bob

2022 was a 1040-NR filed electronically because TP did not meet the substantial presence test.

I just read Notice 2020-70 (which is referenced in 1040-NR instructions), and it does say that the IRS does not accept efiled return for dual-status aliens.  UGH.   TP is in Europe, so getting signatures is going to require TP to print/sign/FedEx to me and then I'll have to mail for TP to IRS.

Welcome to the 19th Century IRS!  Maybe I'll send it via Pony Express.

Thanks again!  (I started with Pub 519, but probably should have started with 1040-NR instructions!)