How do i change the amounts entered on my tax form for cpp and qpp now that I have filled them in already?

Hello sheilam.power,

You can make changes to or ReFile any return that has already been sent to the CRA.

Here is some more information about changing your return:

https://turbotax.intuit.ca/tips/change-filed-tax-return-703

If you have not already filed your return, you can return to the pages on the TurboTax website and edit the information entered. Use the navigator bar on the left hand of the product to return to the Income section, and you will be able to review and edit your slips.