Add on or not

[Mike51]

NFHS A88 (eligible reciever) is held by B15 as he moves downfield, before the pass is thrown. The pass is complete to (a)A88 or (b) A81 either 20 yards downfield or in the endzone for a TD.

Does the penalty "carry over" to the PAT or KO, or the end of the run if not a TD?
Or does it have to be declined to get the results of the play?

Thanks