I painted my kitchen semi-gloss over semi-gloss and now the paint peels off in sheets when trying to remove the tape. I used that new Behr paint with the primer already in it and the guys at Home Depot didn’t tell me I would need to sand or prime. Do I now need to peel this off, sand and start over? Yikes
Well, it's Behr. Most likely the paint needs time to cure before it will achieve good adhesion. Be careful with it and don't do any washing for 2-3 weeks.
If you still have problems you will need to remove as much of the Behr paint as possible. Washing with hot water will do a good job loosing the paint. After it is removed use a good primer, do any patching needed to get the walls in good shape and repaint with good paint (not Behr).