Online closed back on October 15. 2019 is now the prior year. Online and Efiling is now closed. You have to print it out and mail it now. Or switch to the Desktop program to finish.
How to finish a prior year online return
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...
If you paid for the Online version you can ask support to give you the Desktop download. Contact Customer Service 5am-5pm Pacific M-F
https://support.turbotax.intuit.com/contact/
