@CAViejo both the EV Credit and the Solar credit reduce Line 22 *your tax liability"), but this line can not go below zero.
The EV credit is applied first and if it can not be fully consumed, it is lost. (that would mean prior to applying the credit Line 22 was less than $7500.
However, the solar credit can be rolled over to future years until it is totally consumed. THere is no limit on how many years it can be rolled over. Each year, Line 22 would be reduced to zero until the entire credit is consumed.
