You have to start a 2025 return for the side menu to open up. But here's some things you can try if you still have trouble.
Try clearing your cache and cookies. And reboot your device. Then log in again
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-system-requirements/clear-cache/...
Try deleting the cookies, you can also attempt using a different browser other than Chrome or Edge and see if the issue still persists. How to delete cookies
https://ttlc.intuit.com/turbotax-support/en-us/help-article/data-systems/delete-cookies/L009gaGqG_US...
