This bill would change how the government calculates tax credits that help people afford health insurance purchased through the Affordable Care Act marketplace. Specifically, it would allow households to reduce their taxable income by counting Medicare premiums paid by family members, which would increase the size of their tax credits. The bill affects people who qualify for the premium tax credit and have household members enrolled in Medicare Parts A, B, C, or D, or in Medicare supplemental insurance policies. The legislation takes effect for coverage months beginning after December 31, 2024, meaning it would first apply to health insurance coverage purchased starting in January 2025. The bill was introduced in January 2024 and referred to the House Ways and Means Committee but does not specify any direct federal spending or funding allocation.