Do You Cause Propositions About Past Actions?

Presentism riht, which says that only the present exists. You don't cause propositions about the past in the same way that you cause your actions and in the present,. i would say two things. It's not necessarily obvious that ay theory is committed to the non existence of the past. But having said that, im, it still doesn't follow that, even if i am a presentist, a what are the propositions about?