"Major tax filing services such as H&R Block, TaxAct, and TaxSlayer have been quietly transmitting sensitive financial information to Facebook when Americans file their taxes online, The Markup has learned.  The data, sent through a widely used code called the Meta Pixel, includes not only information like names and email addresses but often even more detailed information, including data on users’ income, filing status, refund amounts, and dependents’ college scholarship amounts."

https://www.theverge.com/2022/11/22/23471842/facebook-hr-block-taxact-taxslayer-info-sharing