On October 13, 2020, the Tax Court issued its opinion in Oropeza v. Commissioner (155 T.C. No. 9). The primary issue presented in Oropeza v. Commissioner was whether the IRS obtained prior supervisory approval pursuant to IRC § 6751(b)(1) prior to its initial determination to assess a penalty against the petitioner for tax year 2011.  Specifically, the issue in Oropeza v. Commissioner was whether a Letter 5153 accompanied by a Form 4549-A (an RAR) constituted