I cannot address CA state question but can tell you about Federal form 5695. If you are doing panelboard upgrade in 2024 then you cannot take credit in your 2023 filing. I am not a professional auditor or accountant, just informing you of what I have figured out. Electric panelboard upgrade (to minimum of 200A) costs can be entered on line 25A of form 5695. I went to the form as I did not initially see it in the dialog. But Turbotax software is always updating so it may be more apparent now on the dialog for energy credit. Credit for panelboard upgrade max's out at $600 but put your full cost on line 25A. I did panelboard upgrade in 2023 and heat pump install in 2024. I will take energy credit for latter in next year filing.
