Hello,Turbo tax is calculating 10% max tax credit on energy improvements. The limit is 30% with a maximum of $1,200. Per 2023 IRS publications 5695.
Publication links:
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-credits-deductions/claim-energy-efficient-appliances-energy-saving/L7SdVIMzk_US_en_US?uid=lrc2fv35
https://www.energystar.gov/about/federal_tax_credits/insulation
https://www.irs.gov/credits-deductions/energy-efficient-home-improvement-credit