This is probably the dumbest question one person could ask on here, but I want to get a chase card next month and I'm sitting right at 4/24. If I add my mother on as an authorized user on my discover card would that count to my 5/24? Should I just wait to add her until after I get my chase card instead?
Adding someone else on as an AU to one of your accounts does not equate to you opening another account, so you'd still be at 4/24.
Adding someone else as an AU adds a new account to their credit report, not yours. Nothing to worry about.
ETA: BBS beat me to it lol.