Yes, you can "update" any of the fields. Don't withdraw the profile though. But be sure the draw could be anytime (not sure when) so with that in mind you don't wanna leave an application with "inaccurate" information. In case you get selected then you will need to prove that information is correct.
If you just want to calculate your score, just use the CRS calculator found at the link below:
HAD TO DELETE LINK TO BE ABLE TO POST FOR SOME REASON.
THATS AMAZING! thank you. I got a score of 419. What do you think are my chances? I have a PGWP, I am working but its not considered a job offer because of no PNP or LMIA.
thanks for your help.