After you file

@Critter I'd like to avoid having to do an amended return if possible.  To your knowledge, can I just file 8606 by mail without it involving an amended return?  In other words, can I e-file my return showing the reduced, taxable portion of our distribution with no supporting 8606 in the e-file submission,  and then, just send the printed, supporting 8606 later?  If you think this is possible, do you know if there is an IRS publication that gives the instructions for doing this?  Thanks.