CNBC's Sharon Epperson explains a 2025 tax tip: people enrolled in a high-deductible health plan can contribute up to $4,300 for an individual plan, and more for a family plan, to a health savings account by April 15. The contribution is tax-deductible, and HSA funds can be used for medical expenses tax-free, potentially lowering the 2025 tax bill. The segment is personal-finance guidance rather than an investment recommendation.