I efiled 1120S through turbotax on April 15, 2021, before 3pm and received IRS late filing penalty notice. Who should I talk to at Turbotax?

[tagteam]

You filed your 1120-S late (calendar year S corporation returns were due 3/15/2021).

Generally, an S corporation must file Form 1120-S by the 15th day of the 3rd month after the end of its tax year. For calendar year corporations, the due date is March 15, 2021.

See https://www.irs.gov/instructions/i1120s#idm140355077348880

[AmyC]

The IRS may provide administrative relief from a penalty that would otherwise be applicable under its First Time Penalty Abatement policy. In the future, you will need to actually file by March 15.