Generally revise education tax credit laws

This bill creates a $250 annual tax credit for Montana parents or legal guardians of children attending nonpublic schools. It directly affects families with children aged 5-19 enrolled in qualifying nonpublic schools (as defined in Montana law). The credit, which cannot exceed a taxpayer's income tax liability, may be carried forward up to three years if not fully used in the current tax year. The bill also adds this new credit to Montana's scheduled tax credit review process, requiring its evaluation every eight years starting in 2025.