Keep watching your
bank account online, or check your monthly bank statement.
When you authorize
the IRS or a state taxing authority to withdraw your tax due from a bank
account and provide a date for the withdrawal, you can be assured that the
funds will not be withdrawn before
that date. Very often, it takes a few business days for the withdrawal to
actually be processed against your account, but you should be sure to have
sufficient funds available on the specified date and until the withdrawal is
posted.