nothing now. one of three things will happen. 1) your return will be rejected. then you can add the omissions and re e-file. 2) it will be accepted but in processing the IRS will notice the missing income and either send you a correction notice or ask for an amended return 3) somehow the IRS computers won't catch this now sometimes notices don't go out for over a year. wait until the original is fully processed (you get your refund or your payment s processed and then file an amended return.
