@Critter-3 I don't think it could be those reasons. Mainly because it's for the exact same amount as the tax due. The same amount would only be for the other way....if you had a refund because you entered an estimated payment or extension or applied last years refund when you didn't.
It could be you made an online payment but put down your bank info for the IRS to pull it out. See if you have 2 payments coming out of your credit card or bank account.
