Here are some of the key tax-related deadlines that apply to businesses and other employers during the second quarter of 2024. Keep in mind that this list isn’t all-inclusive, so there may be additional deadlines that apply to you. Contact us to ensure you’re meeting all applicable deadlines and to learn more about the filing requirements. April 15 If you’re a calendar-year corporation, file a 2023 income tax return (Form 1120) or file for an automatic six-month extension (Form 7004) and pay any tax due. For corporations, pay the first installment of 2024 estimated income taxes. Complete and retain Form 1120-W (worksheet) for your records. For individuals, file a 2023 income tax return (Form 1040 or Form 1040-SR) or file for an automatic six-month extension (Form...