Filed/submitted/accepted returns for Fed and State on 4/13.
Authorized payments for both to be pulled 4/14. Even if the 14th was a Sunday....the payments still should have pulled on Monday 4/15. Why did the payments not pull on the 15th? I received late penalties....again, why?
When filing the last few days of tax season when millions of filers who owe are jamming the system it can take a week or 2 for the feds or state to catch up with all the payments requested ... as long as you were filed and accepted by 4/15 and the payment request was for that date or prior then you are fine. If you get a notice for late fees respond then send proof of timely filing and the payment request to refute the bill.
For future filings ... do NOT wait until the very end to file the return ... you can file it anytime prior to 4/15 (as early as January even) and still have the payment come out on 4/15 ... this way your payment instructions are in way before the big rush at the and it avoids the possible need to deal with an IRS letter.