I had the same issue and could not make the error go away. I've had the vehicle longer than 5 years, and it would be fully depreciated under both the regular and AMT methods. But alas ... I could not make the software do what was required. Since TurboTax had this error last year, I'm not sure why it has not yet been corrected. The federal form had no errors, but the California form would not let me e-file since I could not correct the "error". I attempted to make a change using the Forms mode - which had to be accessed in a way differently than prescribed - but this did not work either. Then I attempted to make the change using another thread's suggestion of marking the vehicle as used for personal purposes only and then using the "sale of business property" but that was a bigger mess for me. Please fix the program.
