I'm having the same problem and same error. My wife and I file joint so the living together question comes up (its our one and only residence and home and we both live here). Turbotax gave the credit 2 weeks ago. Last week after an update it removed the credit. If I pretend I bought a heat pump (same legislative credit) it takes it. Move it two lines down to hot water heat pump and it changes the answer to "Based on what you've entered so far, we can't get you the home energy credit for 2025 and you have no credit to carry forward to 2026."
I'm positive I qualify for the credit. I'm positive it was installed in 2025. I have the QMID. Again, it listed the credit in the proper space two weeks ago. I never went back to that section. I updated the software at launch and it sent my numbers sideways, which I tracked to this credit disappearing.
The belief is this weeks update will fix it? My concern with pinning this on an IRS and not Turbotax error is two weeks ago it was fine.
