For PA-145A “What was the purchase price of your parents’ home?”, if my father bought the house with others do I just put down how much he paid?
Do your parents now own the home in its entirety? If not, what did you put down for the home’s current value?
My guess is that if they originally bought only a part of the home, and still own only a part, you’d put the value of their share only.
Regardless, you’re going to want to explain this situation in the box at the end of the CSS Profile, where you’re asked to provide additional details on this type of unusual situation.