Newly bought property: when deduct first year property taxes

I bought a new investment property in Sept 2020. I do not escrow the property taxes in my mortgage.

As usual, at the closing, the amount of taxes (Jan-Aug) prior to the purchase was discounted from my purchase price. 

I physically have not paid any property taxes in 2020 on the rental property, since the 2020 taxes will be paid in 2021.

 

What value should I put on the 2020 taxes at the voice: property taxes? Should I put zero or should I guestimate the amount of taxes based on the closing statement?

 

 

 

 

In 2020 I phisically did not pay