If it was for a direct debit, you may want to call the IRS EFW number and cancel it...for some reason I feel like years ago I remember a client getting hit with a insufficient funds fee when the acct number was wrong for a direct debit.
If the account number is wrong, the bank will return the deposit to the IRS, the IRS will then issue a refund check and mail it to the address shown on the return....so make sure you've got a good address on the return!
