This TurboTax Canada FAQ tells you how to use ReFile: https://turbotax.community.intuit.ca/turbotax-support/en-ca/help-article/accounting-bookkeeping/filed-tax-return-still-make-changes/L992Trv7f_CA_en_CA
You can login to TurboTax Online 2023 here: https://ww1.2023.ca.turbotaxonline.intuit.com/