Assuming name in Ontario - did you change your sin card / update the Cra? what name do you use for taxes?

I know this is an old post but is the general consensus here that I do not need to change my SIN? I am just assuming my partner's last name. I wasn't even aware that they do not even hand out the SIN cards anymore.

I still understand that I would need to change my name with the CRA.

Go to Service Canada in person with your marriage certificate or certified copy of marriage registration, old SIN card and ID. If you were born in another country, bring your PR / Canadian Citizenship certificate, they will ask for your parents' names.

Your drivers license and health card information will be changed and replaced with the proper name as you would change it over to your husbands. The sin card no longer needs to be replaced as the name change will be updated on the governments end. As for the passport, it would be good to change it soon so you are ready for travelling and getting it back in time without any delays.

The taxes would be using your married name as you would be claiming yourself a spouse as the same for him.

I may be wrong but from my understanding assuming your husband's name is not the same as legally changing your name. Legally changing your name means changing your birth certificate too. You do not need to do that or worry about your sin card if you're just assuming his name. I am certainly not doing that!

You change your name on your SIN just as you would with drivers licence.
If you have an existing SIN card, they will still send you a new one. Hope this helps

The government no longer issues SIN cards anyway so there's no need to change it. You can do an assumed name change with all federal files (ie CRA) like you do with provincial ones.