You can store any leftover chicken pot pie in a tightly covered container or glass dish and refrigerate for 4-5 days. Of course, for a longer salvage, you can store your uncooked pot pie filling in the freezer using a freezer-safe storage bag or container for up to 3 months. Once ready to use, thaw overnight in the fridge, add filling to a baking dish, add your freshly prepped biscuits, and bake per the recipe.