Updating meaning certain terms used in WV Personal Income Tax Act

This bill updates West Virginia's tax code to align with specific federal income tax changes made before January 1, 2025, while excluding any federal changes adopted after that date. It directly affects taxpayers who use medical savings accounts (like HSAs), clarifying that employer contributions to these accounts aren't considered taxable wages for state withholding purposes. Key provisions include defining "taxable trust" to exclude medical savings accounts, specifying that state tax law follows federal rules for income tax calculations up to 2024, and preserving prior tax law for years beginning before 2025. The changes apply retroactively where permitted by federal law, affecting how West Virginia calculates personal income tax for most residents.