That's why some may be looking to maximize what they get back by prepaying next year's state and local taxes now,
Gill says not to do that.
It's because the tax reform plan will only let you write off estimated state and local income taxes in the year they are due - so people who are self-employed or own their own businesses should hang onto their money.
That rule doesn't apply to property tax, so prepaying the second installment due in February can boost your refund.
"I couldn't paint it as a better picture than, we're going to wake up on January first, and it's a whole new tax world," Gill said.
Gill says it's a better idea to get a write off is to make a charitable contribution now, especially for those who may stop itemizing next year.
The tax plan lowers rates in seven brackets and doubles the standard deduction, which most renters take. That means individuals and married couples, especially renters, will be able to write off more on their taxes.