On February 26, 2020, the Tax Court issued a Memorandum Opinion in the case of Tran v. Commissioner (T.C. Memo. 2020-27). The three primary issues presented in Tran v. Commissioner were (1) whether the IRS is barred by the doctrine of collateral estoppel from relitigating the petitioners’ tax liability for 2006; (2) whether the petitioners failed to report gross receipts on Schedule C (Profits or Loss From Business) with regard to their nail salons in