On March 27, 2020, Canada Border Services Agency (CBSA) announced that the deadline for all payments due to the Agency will be extended to June 30, 2020. This includes those on the statement of account of March originally due on April 1, 2020. The due date will be automatically changed, and companies do not need to apply.
More information on the duty deferment can be found here:
And here:
https://www.cbsa-asfc.gc.ca/publications/cn-ad/cn20-11-eng.html