TP's 2019 1040 results in a NOL. Since F 1045 can't be e-filed can the 1040 be e-filed now and then the F 1045 prepared afterward to carry back the NOL to 2014?

I can't find any instructions indicating that I have to wait until F 1045 is completed before e-filing the 2019 1040. It seems logical that I can go ahead and e-file but what seems logical isn't always the case.

Thanks.