04/15/2021
Monthly filer payroll tax due
Form 1120 C Corporation Returns due
- Tax returns 1040, 1041, or extensions due - IRA/HSA/ESA contribution deadline - Excess contributions corrective refunds due
Q1 estimated payments due for individuals, trusts, corporations
04/30/2021
- Q1 form 941 - File form 730 and pay the tax for accepted wagers