State of Oklahoma Property Tax Credit or Refund 

The form 538-H must be filled out and mailed to the Oklahoma Tax Commission at:
PO BOX 26800
OKLAHOMA CITY, OK  73126-0800

Anyone who is 65 or older or totally disabled, who is head of household, and a resident of the state of Oklahoma during the previous year and whose gross household income does not exceed 12,000 is qualified for this program. You may obtain the necessary form from the Oklahoma Tax Commission at  (405) 521-3160  or download the form from the State's website here  https://www.ok.gov/tax/Forms_&_Publications/Forms/Ad_Valorem/ .