For the RRSP contributions you made through work, you just need to enter your T4 slip as is. Your employer has to report those contributions, so the CRA will make adjustments if needed.
For the contributions you made on your own, you would have to put any contributions from the 1st 60 days of 2022 onto your 2021 return. You can use ReFILE to make your changes. This TurboTax FAQ has more information: https://turbotax.community.intuit.ca/community/tax-return-amendment/help/i-have-filed-my-tax-return-...
You can also make changes using the Canada Revenue Agency (CRA)’s My Account service or send in a request by mail, using a completed T1-ADJ T1 Adjustment Request.
