(1) For tax years commencing on or after January 1, 2013, a person who buys a registration number under section 42-1-402, C.R.S., is allowed a credit against the income taxes imposed by this article for twenty percent of the portion of the purchase price that the license plate auction group, created in section 42-1-403, C.R.S., certifies exceeds the registration number's fair market value. This is the value the license plate auction group expects from the sale of the registration number, not the cost of registering the vehicle.
(2) If the credit allowed by this section exceeds the tax otherwise due, the taxpayer may carry it forward for up to five years but shall claim it on the earliest possible subsequent tax return.