"The deferral applies to deposits and payments of the employer's share of Social Security tax that would otherwise be required to be made during the period beginning on March 27, 2020, and ending December 31, 2020. (Section 2302 of the CARES Act calls this period the "payroll tax deferral period.") 

The Form 941, Employer's QUARTERLY Federal Tax Return, will be revised for the second calendar quarter of 2020 (April - June, 2020). Information will be provided in the near future to instruct employers how to reflect the deferred deposits and payments otherwise due on or after March 27, 2020 for the first quarter of 2020 (January – March 2020).  In no case will Employers be required to make a special election to be able to defer deposits and payments of these employment taxes."
https://www.irs.gov/newsroom/deferral-of-employment-tax-deposits-and-payments-through-december-31-20...