taxlitigator.me/2020/04/25/fifth-circuit-affirms-district-court-order-enforcing-john-doe-summons-issued-to-texas-estate-and-tax-planning-firm-by-robert-s-horwitz/
federaltaxcrimes.blogspot.com/2020/04/fifth-circuit-rejects-attorney-client.html
www.fredlaw.com/lets-talk-about-tax/how-to-undermine-your-tax-positions-lets-talk-about