the cqww is over now if i submit my qso's they will penalize me 3 points for each bad one. Is there a way to check validity of call signs without manually entering all of them in qrz???
Technically, that is breaking the rules.
It is OK to make yourself notes of entry errors to correct later, like if you know you entered something wrong, but changing the log to remove calls you look up after the contest is against the rules.