I would call this a bug in TT. In order to fill in numbers for 8958 one needs to search topics for "Community Property Worksheet". The interview there fills out 8958. For my case it looks like TT correctly determined what income is community, based on my readings about RDPs and community income. From there, search topics for "Community Property". That allows for input of adjustment amounts for community income and withholding. The amounts must be calculated by hand by looking at 8958 so that partners are sharing 50% each. They get push to your 1040 form.
We're going in to HR Block on this. I'll update if I find out anything new or different.
