Roll out the crescent rolls flat and separate into the four squares. Push the seams together so there is no separation in the square (or separate them to make triangle apple turnovers).
Spoon the apple pie filling onto one side of the turnover.
Using a fork, press the edges together.
Place the apple turnovers on a greased baking sheet (or a sheet lined with parchment) and bake for 18-20 minutes, or until brown.