I would prepare an agreement for mutual rescission of the lease and refund her $ once she signs it... and would do everything in my power to prevent her from taking possession.

The court hired a process server to serve tenant, the tenant had 7 days to respond, she did not respond. 3) 7/9/2018 Because notice went uncontested I filed “application for entry of default judgment” 4) 8/13/2018 Default Judgement signed by the Judge.5) 8/21/2018  filed "Writ of Possession" (Min Seven days waiting period after default judgment signed)6) 8/24/2018 Writ of Possession signed by the Judge.

You may want to forward the tax bill to the current owner via mail and hope that he/she pays before the City takes possession.  

They are very hard to do without a pot of seed money that allows you to close and get possession. 

Can she take possession of a property.

It’s too easy for the applicant to stop payment or to have the check bounce after you’ve already given them possession, and then you’re stuck with a tenant who’s paid you nothing and you’d have to go through the full eviction process to remove. 

I think @Kenny Dahill has a great point, but I'd talk to a lawyer about your local laws and if the process can be expedited if the ex-tenant is cooperative about surrendering possession in a legally satisfactory way.

YES or NO (circle one) If you answered YES above, do you possess a copy of that written agreement?

Usually when someone has put in writing to you that they have moved out, turned in their keys and rent has not been paid, it is typically now in your possession.

Sounds like you bought a house, with taxes paid up for the quarter already and you took possession sometime during the quarter. it also sounds like they forgot to calculate the tax credit due to the seller at closing. if that's the case, I believe most purchase contracts have a clause that states you will make it right if there was some miscalculation or simple omission at closing. even if not, the old owner paid for taxes and you are benefitting unjustly. the ethical thing in my mind is to refund the extra tax. there is no reason to go to court for this.if i'm wrong, please explain the situation better.