10/1/2021 Deposit payroll tax for payments on Sep 25-28 if the semiweekly deposit rule applies.
10/6/2021 Deposit payroll tax for payments on Sep 29 - Oct 1 if the semiweekly deposit rule applies.
10/8/2021 Deposit payroll tax for payments on Oct 2-5 if the semiweekly deposit rule applies.
10/12/2021 Employers: Employees are required to report to you tips of $20 or more earned during September.
10/14/2021 Deposit payroll tax for payments on Oct 6-8 if the semiweekly deposit rule applies.
10/15/2021 Deposit payroll tax for payments on Oct 9-12 if the semiweekly deposit rule applies.
Deposit payroll tax for Sep if the monthly deposit rule applies.
Individuals: File Form 1040 if you requested an extension.
Non-Resident Alien Individuals who received wages as an employee subject to U.S. income tax withholding: File Form 1040NR or 1040NR-EZ if you filed Form 4868.
Corporations: File calendar year Form 1120 if you requested a 6-month extension.
File Forms 990-T (Section 401(a) or 408(a) trusts) or Form 1120-POL for years ending 12/31/20
File Forms 990, 990-EZ, 990-PF, 990-N, 990-BL, 990-T (Trusts other than section 401(a) or 408(a) trusts), 4720, or 8868 for years ending 12/31/20
10/20/2021 Deposit payroll tax for payments on Oct 13-15 if the semiweekly deposit rule applies.
10/22/2021 Deposit payroll tax for payments on Oct 16-19 if the semiweekly deposit rule applies.
10/27/2021 Deposit payroll tax for payments on Oct 20-22 if the semiweekly deposit rule applies.
10/29/2021 Deposit payroll tax for payments on Oct 23-26 if the semiweekly deposit rule applies.