Due to the February winter storm in Oklahoma, required filing deadlines have been extended to June 15, 2021 for the following: 1120S, 1120,  1065, 1040, 990, and 941, including quarterly payments as well as retirement contributions.

 

More information can be found at this link:

  https://www.irs.gov/newsroom/irs-announces-tax-relief-for-oklahoma-severe-winter-storm-victims