It may be worth having her urine checked by your vet to rule out a bladder infection or other issue causing her to urinate in the house.
Is this a new behavior? Have you added a new dog, cat, roommate to the house? If nothing at all has changed, best option is a deep clean (enzymatic cleaners etc) of all areas that have been previously marked. Keep items off the ground that she will likely try to mark. If you catch her in the act immediately make a loud noise and "no". My friend's male dog used to mark in two different spots EVERY time he came to my house so I sprayed some water with lime juice (or any citrus smell) on the walls where he previously marked, dogs hate citrus so he avoided that area and no longer marks there. If she marks in one spot, start feeding her in that area/room. Dogs hate going to the bathroom where they eat. It may also be time to go back to square one, limit her freedom, and begin the whole potty training process over again because if she is urinating in the house she is no longer fully potty trained. Restrict her to small areas or keep her leashed when she is loose, make her earn her freedom all over again.