Payroll taxes and current year quarterly tax estimates are due as they normally are. The below dates are specifically about 2021, 2020, and 2019.

January 23, 2023
IRS Starts Processing Tax Returns for 2021, 2020, and 2019  *Forms don’t have to be mailed out until Jan 31, so most people cannot file on this date. I typically start the “wealthie” e-files no earlier than between Feb 7 and Feb 15 to allow for companies to send out W2s and 1099s.

January 31, 2023
Deadline for 1099 NEC (If an extension is needed it has to be postmarked by Jan 31, there is not electronic filing for an extension for these forms) 

July 15, 2023

Last day to file 2019 return to get a refund or to file electronically for regular deadline and other rights / benefits can be lost. Around this time a lot of COVID related grace dates expire.

April 18, 2023

Tax Filing Deadline (Wage Earners / Disregarded Entity Income)
Deadline for Extension Filers (Wage Earners / Disregarded Entity Income)

September 15, 2023
Deadline for Extension Filers (Recognized Corps)

October 16, 2023
Deadline for Extension Filers (Wage Earners / Disregarded Entity Income)

Last day to file 2021, 2020. For 2019 with extension. After this date 2019 can only file by paper and other rights / benefits can be lost.