Schedule C for 2019 has long been available. you'll need to contact support to help troubleshoot your issue. your only other option is to backup the TT data file xxxx.tax2019 (this is for safety purposes since uninstalling TT should not delete the tax data file) uninstall, reboot and reinstall. then check for updates to see if that might work.
Contact Customer Service
https://support.turbotax.intuit.com/contact
