I wanted to let you know about a recent publication from the American Bar Association.  It is an essential reference for any tax controversy or Low Income Taxpayer Clinic worker.  I was co-author of chapter 5 for this edition, "Securing Information from the IRS by Taxpayers."

Effectively Representing Your Client Before the IRS, 8th Edition

Edited by Christine S Speidel and Patrick W Thomas

Effectively Representing Your Client Before the IRS is a comprehensive collection of everything a tax professional should know when dealing with the IRS.

https://www.americanbar.org/products/inv/book/404782279/?fbclid=IwAR3poLqI9KQeg_M9-fxvRG7R2NuB2q1NiEObaYU3_NvD7ZLLybf3tk4nCUs