Yes, the first thing to look into is to see if your group has been set up as an independent parent group, or PTO, or if it is committee within the school. If it is an independent group, see if you can have a conversation with your fellow board members, get some history, and discuss how you'd like to move forward. Perhaps your board could meet with the school administration to see if there's any room for discussion about change and giving your group more independence to make financial decisions. It always helps to let the school know that parent groups can accomplish a great deal as an independent group. Parents really feel ownership in the group and work hard to accomplish things on behalf of the school.
Please stay in touch!