No taxes are not paid until your escrow agent pays the tax. Call them right away to have them pay January tax early, unless you are subject to alternative minimum tax.
For my old clients whose itemized deductions were close in amount to the standard deduction, I advised them to do this to maximize the deductions.
IRS has no choice but to allow it. Individual taxpayers income and deductions are based on the cash basis, i.e. when you get paid, and when you pay your taxes.
They just raised my house payment, beginning Jan 1, for more in the escrow. I refinanced to lower my payment and taxes and insurance went up last year. My house worth went up also. Irma came through here and I have a new roof.. insurance raises payments with one claim?
You got that right about the AMT. I have Turbotax 2017 software and ran my info thru it both prepaying and not prepaying. And es macht nichts! Regular tax goes down but the AMT goes up by the exact same amount.