And this is why you should always start with a new account when you divorce and not to try to transfer in the prior year joint information as making all the changes may not be easy.
If support cannot help you then I suggest you switch to the downloaded program ( you only need deluxe if you need a state and the basic if you don't) so you can do the override in the FORMS mode.
https://ttlc.intuit.com/community/choosing-a-product/help/how-do-i-switch-from-turbotax-online-to-th...
