So the Community Property state information should be on Form 8958.

As far as how you allocate, I would refer to the government instructions.  Per the About if you right click this form in ProSeries, it calls out entries on this form have no impact on either the fed or state return.  Further since TX has no actual 1040 version of the return, I am unsure on how the allocation would have impact but here is the IRS pub on Community Property for reference: https://www.irs.gov/forms-pubs/about-publication-555