What if your church owes property taxes for your church property the church itself where you currently hold services due to the fact that during the time of acquisition you did not hold 501c3 status a?

Having 501c status is relevant to income taxes. It may, or may not make th real property owned non taxed. That depends on each little taxing jurisdcition.

As long as your Property is listed as taxable, it is (or was) and the church owes the tax...or the community it is in should/will/can/must seize the property and sell it for back taxes just like any other.