If your return is pendingYou should be fine. Your submitted e-filed return doesn't need to be accepted on April 15, 2019 for it to be considered on-time.
- As long as you transmitted your return by 11:59 p.m. local time on April 15, 2019, you should be fine.
If your return is rejectedIf the status of your return is Rejected on April 15, 2019, you'll have through April 20, 2019 to re-submit your federal return by e-file, or mail your return. More info and instructions