The Affordable Care Act was enacted on March 23, 2010. For a detailed description concerning each of the tax provisions enacted, click here.
Note that the Tax Cuts and Jobs Act of 2017 reduced the shared responsibility payment calculated on Form 8965 to zero beginning in tax year 2019.
Additional Information:
IRS Publication 5187 Affordable Care Act: What You and Your Family Need to Know (last year updated was 2020)
IRS Publication 974 - Premium Tax Credit (PTC)
IRS: Instructions for Form 8962
Premium Tax Credits - Claiming the Credit and Reconciling Advance Credit Payments