@daisyismad After further investigation it looks like there is a bug in the program. You should have received the full $2,000 credit. This is a part of the program that is new for tax year 2023 so it appears further work on this section is required. Looking at prior posts this is a known problem and a fix in the software is being made.
From IRS Form 5695 page 3 - https://www.irs.gov/pub/irs-pdf/i5695.pdf
Joint occupancy. If you owned your home jointly with someone other than your spouse, each owner must complete their own Form 5695. To figure the credit, enter the amounts you paid for these items on the appropriate lines of Form 5695, Part II. The amount allocable to you is the smaller of:
1. The amount you paid, or
2. The qualifying credit of the property multiplied by a fraction.
The numerator is the amount you paid and the denominator is the total amount paid by you and all other owners.
