On September 23, 2021, the Tax Court issued a Memorandum Opinion in the case of Parker v. Commissioner (T.C. Memo. 2021-111). The primary issues presented in Parker v. Commissioner were (1) whether petitioners can deduct, on Schedule C (Profit or Loss From Business), car and truck expenses in excess of the amount the IRS allowed; (2) whether petitioners can deduct retirement contributions in excess of the amount the IRS allowed; (3) whether petitioners can deduct expenses