Yes, you can freeze the pot pie before baking. Spoon the filling into an airtight container and transfer it to the freezer. Place the cut biscuit dough on a baking sheet, cover it and place it in the freezer until the biscuits are completely frozen. Then transfer them to a plastic freezer bag and freeze them for up to three months.  When you’re ready to bake the frozen chicken pot pie, thaw the filling and biscuits, transfer it to a baking dish, top with the cut biscuits and bake.