You need to either add or deduct the amount on your settlement statement for the amount you paid in property tax in 2016.  If the amount on the statement increased the amount you received from the purchaser, you would reduce the amount you report as paid for property tax by that amount.  If the amount on the statement decreased the amount you received then you would add it to the amount you "sent a check in for", as it would represent an increase in the amount of tax you paid.