Lengthwise through the first door and down to the landing. At the landing raise it up until it gets around the corner.
That method will get you pretty close, if it still hangs up, see where you can cut out part of the wall to get them the rest of the way around the corner. Probably, really low headroom is compounding the problem.
Did the snap the back thing of course horizontal installed the bottom run 1rst with a good liine down to 48 1/4 cut the bottom pieces to size before snapping and I put a thin line of mud on the back of the cut(?)
use alot of screws. still looks good and not as humpy as trying to tape a cut vs. taper edge.