I have similar issue. I am using TurboTax Deluxe on my PC, not the online product. The software did inform me that I need to file form 804, but "not to worry" because I would be prompted to upload a PDF of the form as I was filing. I was never prompted to upload the form and the state rejected the e-file. The instruction in the software explained how to add this PDF if you are using the online product or Pro Series, but nothing for TurboTax Deluxe. In the menu dropdowns there is a function called Attachments, but it is greyed out.
