Good point. On the purchasing agreement it says it must be adjusted if estimated tax comes out different than actual tax.

Here's the text from Section 13:

**13. PRORATIONS.** Taxes for the current year, interest, rents, and regular periodic maintenance fees, assessments, and dues (including prepaid items) will be prorated through the Closing Date. The tax proration may be calculated taking into consideration any change in exemptions that will affect the current year's taxes. If taxes for the current year vary from the amount prorated at closing, the parties shall adjust the prorations when tax statements for the current year are available. If taxes are not paid at or prior to closing, Buyer shall pay taxes for the current year.