« All Events This event has passed. Income tax return (Form 1040) filing and payment deadline for sole proprietorships and single-member LLCs April 15, 2021 « Deadline to Contribute to an IRA or HSA for prior tax year 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 » + Google Calendar+ iCal Export Details Date: April 15, 2021 Event Category: Tax - Due Date - Business Taxpayers