Employers - Deposit Social Security, Medicare and withheld income taxes for March if the monthly deposit rule applies.

Employers - Deposit nonpayroll withheld income tax for March if the monthly deposit rule applies.

Employers - Report Social Security and Medicare taxes and income tax withholding for first quarter 2024 (Form 941) and pay any tax due if all of the associated taxes due weren’t deposited on time and in full.

Individuals - Report April tip income of $20 or more to employers (Form 4070).

Employers - Report Social Security and Medicare taxes and income tax withholding for first quarter 2024 (Form 941) if all associated taxes due were deposited on time and in full.

Employers - Deposit Social Security, Medicare and withheld income taxes for April if the monthly deposit rule applies.

Employers - Deposit nonpayroll withheld income tax for April if the monthly deposit rule applies.

Calendar-year exempt organizations - File a 2023 information return (Form 990, Form 990-EZ or Form 990-PF) or file for an automatic six-month extension (Form 8868). Pay any tax due.

Calendar-year small exempt organizations (with gross receipts normally of $50,000 or less - File a 2023 e-Postcard (Form 990-N) if not filing Form 990 or Form 990-EZ.

Individuals - Report May tip income of $20 or more to employers (Form 4070).