I want to file jointly with my spouse, but I think I missed a step. How can I go back to set up my return so we can file jointly? At the intro it currently is set to "no" for joint prepration, and I can't change it.

Due to the complexity of calculations related to marital status, once you've moved past this section, you can't go back and edit it. If you've already moved past this section, you'll have to start a new return.

Be sure to answer Yes to the question Do you want to prepare your returns together? https://turbotax.community.intuit.ca/replies/3220042