«In tax year 2017, the last year before the Tax Cuts and Jobs Act (TCJA) took effect, approximately 5 million taxpayers had to pay under the AMT. The TCJA increased the AMT’s exemption and exemption phaseout through 2025, greatly reducing the number of taxpayers subject to the AMT, to an estimated 200,000.»

https://taxfoundation.org/tax-basics/alternative-minimum-tax-amt/