Property tax for home

Hi there,

For property tax that I enter in Turbo tax, should I take average of 2018 and 2019? For example, if my property bill of 2018 shows x for each installment and if the property bill for 2019 shows y for each installment, then should I do (x+y)/2? Where can I find this info on what is the right way to compute this? Thanks so much!