Thanks @DavidD66. But accessing and filling out Form 8958 doesn't alter the return.
I ended up uninstalling TT, and reinstalling it. The step-by-step search function then worked. After which I was able to find the community property step, make the necessary adjustments, and file our MFS returns.
TT is still pretty much all DIY when it comes to MFS, but it can be forced to work.
