So after two sessions and about an hour on the phone with Intuit, the conclusion is that the 2023 version of Turbotax Deluxe cannot handle self-employed taxes, and I would need to buy the Home & Business version. Maybe I'll do that for next year, but for this year I'll just fill out the forms manually, as that seems to work.
Strange that the 2022 Deluxe version had no problems with self-employment taxes.
Maybe the Home & Business version would work, but I have no way of knowing without buying it!
