@QC_ @joyrealdv
Let me chime in the conversation for a moment.
CRA and Service Canada in fact exchange information between them.
That been said, you need to create a new CRA account with your new SIN number, they will eventually link your new account to the information of your old one.
In the case of Revenu Quebec. you should call them and just tell them your new SIN by phone, then after a week or so you can create your new account (this wait time applies to CRA too). This is because CRA and Service Canada exchange information once a week, it is at that point that they verify your new SIN, you may encounter error 210 during the creation of your new accounts, this is because not enough time has passed yet).
You need to create a new Service Canada account too, remember to save as much information as possible from your old Service Canada account, as the new one will have very little stuff from the old one (kinda like a new person), they are both linked but you just can't see it. I had to call service canada and they had to send me by snail mail some information that I needed from my old one.
You also need to schedule a call with RAMQ in order to renew your RAMQ card, as you are a PR now. Strangely, they will only renew it for 1 year, instead of 3 years. Kinda like they are considering that you "just" arrive in Canada, even if you previously had a work permit or whatever here. After 1 year, you can renew it normally, for 3-5 years each.
Also remember to print, sign and save your Ecorp, it has some numbers that your Pr card has not, and some agencies from the government can ask you for it.
Finally tell your bank you have a new SIN and PR status, as you can access other stuff from them and it is useful for tax declaration later on.
That is all, good luck you all.
