Why are there indented sides? The window frame should be flush with your wall.

I probably didn't explain too well. When you buy drywall, all 4 sides are "indented" for what I assume is for the taping and mudding to come out flush. What do you do when you have to butt up two pieces that were cut and don't have "indented" sides? Does that make sense?????

any help??????? anyone???????

Tape the joint where the 2 pieces of drywall come together. Apply mud first along the joint line, apply the tape and smooth out with a wide flexible putty knife. Let dry overnight and go back with the putty knife scrape any obvious high points. Apply another coat of mud going further out using a wider trowel. The idea is to feather out the taping job so that there is a smooth transition from the original drywall over the tape job to the other original drywall. Takes a lot of finesse and practice. Sand the finish job, again looking for the smooth transition. Good Luck

you will get a better joint if you use the mesh tape on a butt joint as if does not require as much material buildup as the paper tape. it is necessary to feather the joint at least 6-8 inches on each side if the seam so that the joint is not readily discernable

JMHO

Carl