The Heritage Foundation has a tax-exempt status that depends upon their not engaging in political action. They of course do just that, with their project 2025.
Here's the form to report them to the IRS:
https://www.irs.gov/pub/irs-pdf/f13909.pdf
@JonPowell didn’t they buy the politicians trying to force defunding the IRS?
@JonPowell #USpol for some visibility