Would you be able to please provide the name of state you reside in since each state has their own input directions.
However, I will list the steps for the state of Minnesota since that is one of the common states.
As you're preparing your Minnesota taxes, look for the Other Forms You May Need screen (towards the end of the interview, past the estimated taxes and extension topics). Check the first box and follow the onscreen instructions.
After the State Elections Campaign Fund and Nongame Wildlife Fund screens, you'll come to the Filing instructions screen. Select Print Form M1PR and mail the printout by August 15 to:
Minnesota Property Tax Refund
Mail Station 0020
600 N. Robert St.
St. Paul, MN 55145-0020
You can also file your M1PR free of charge at the MN Dept. of Revenue Property Tax Refund site