This document provides information about Montana's Alternative Energy System Credit tax credit. It outlines the following: - What types of alternative energy systems qualify for the credit, including solar, wind, biomass, and low-emission wood burning systems. - The costs that qualify towards the credit calculation, including the system costs and any grants received. - The maximum credit amounts for individual, joint, and separate filers depending on who paid for the system. - Instructions on carrying unused credit amounts forward for up to four years. - Clarification that repairs to existing systems do not qualify for additional credits.