If you benefit from paying your 2018 property tax in 2017 call your tax collector for details. Most allow you to 1. Walk in and pay today, call for their hours 2. Mail along with a note to be paid in 2017, must be postmarked by tomorrow 3. When available pay by credit card online. There is usually a 2-3% credit card fee for this method.
You can also call your mortgage company. Wells Fargo will mail out by 5pm today.