« All Events This event has passed. Income tax return (Form 1120) filing and payment deadline for calendar year C-corps and multi-member LLCs that elect to be classified as a corp April 15, 2021 « Income tax return (Form 1040) filing and payment deadline for sole proprietorships and single-member LLCs Request for automatic 6 month extension (Form 7004) filing deadline to extend filing Form 1120 » + Google Calendar+ iCal Export Details Date: April 15, 2021 Event Category: Tax - Due Date - Business Taxpayers