katrinajernae96271 katrinajernae96271 26-12-2023 Business contestada To determine if an employer is a monthly or semiweekly depositor for 2021, the lookback period is:a. January 1 - December 31, 2019.b. July 1, 2019 - June 30, 2020.c. October 1, 2019 - September 30, 2020.d. January 1 - December 31, 2020.