How to trigger "Interest paid on loans from a utility company to purchase energy efficient equipment or products for California residences" for CA?

Loan interest for personal residences is only deductible if it is paid to acquire or improve the residence, and if it is secured by the residence. If it's a personal, unsecured loan (not a mortgage), then the interest isn't deductible. Some California utility company loans are also interest-free.

Enter all of your mortgage interest in the Federal section of TurboTax. The California section will ask questions to determine whether any additions or subtractions from Federal amounts are needed. For example, California has a higher loan balance limit than the Federal return.

See this tax tips article for more information about energy tax credits available this year for the purchase of certain qualifying equipment for home improvements.