On April 15, 2024, a married couple filed their joint 2023 calendar-year return showing gross income of $120,000. Their return had been prepared by a professional tax preparer who mistakenly omitted $45,000 of income, which the preparer in good faith considered to be nontaxable. No information with regard to this omitted income was disclosed on the return or attached statements. By what date must the Internal Revenue Service assert a notice of deficiency before the statute of limitations expires? December 31, 2026. April 15, 2030. December 31, 2029. April 15, 2027