Press the zipper tape flat with a warm iron
Open the zipper and place it face down on the right side of the fabric
Align the zipper teeth with the seam line
Pin or clip the zipper tape in place
Use an invisible zipper foot on the sewing machine
Stitch from the top of the zipper tape down to the zipper stop
Repeat on the other side of the zipper, matching the seam line carefully
Close the zipper and check that both sides are even
Sew the remaining seam below the zipper with a regular zipper foot
Press the seam open and the zipper flat
Test the zipper to make sure it opens and closes smoothly