For people who didn’t have minimum essential coverage at any point between 2014 and 2018, Form 8965 was used to claim exemptions from the individual mandate penalty, if applicable. Exemptions granted by the IRS are no longer necessary (as there’s no longer a federal penalty for being uninsured), so this form is no longer needed for current tax returns. But some states have individual mandates now, and residents can access state tax forms for claiming exemptions. The health insurance exchanges can also still provide exemptions from the individual mandate, which are necessary to enroll in a catastrophic health plan if you’re 30 or older (note that the exchanges use their own form for this; it’s not a tax form).