CRA COVID-19: Already filed paper returns

As of April 20, 2020 the Canada Revenu Agency (CRA) will allow the transmission of a return even if it has already been mailed to CRA on paper, as long as it has not yet been processed. This measure will not apply to any return:

This is part of CRA’s ongoing efforts to assist Canadians in filing their income tax and benefits returns given the importance of filing returns by June 1st to ensure Canadians receive the benefits to which they are entitled.