Dallas County Tax Office – Grand Prairie 106 W. Church StGrand Prairie Texas 75050 TX Dallas 106 W. Church StDirections (214) 653-7811 Monday 08:00 am - 04:30 pm Tuesday 08:00 am - 04:30 pm Wednesday 08:00 am - 04:30 pm Thursday 08:00 am - 04:30 pm Friday 08:00 am - 04:30 pm Saturday Closed Sunday Closed