I have the same problem. My federal tax return was accepted on March 26th, 2021, the withdrawal date was supposed to be April 1st, 2021. Today (April 12th, 2021) still nothing was withdrawn from my account.
The bank account number is correct because State tax has been withdrawn on April 2nd, 2021.
I called EFTPS (IRS e-file Payment Services) they said they have nothing in their system... I don't know what is going on.
