File your tax return early or before the due date. to avoid being charged a late-filing penalty and disruption of your benefit and credit payments such as the Canada Child Benefit and Goods and Services Tax Credit.
The late-filing penalty is 5% of your 2020 balance owing. For each additional month you are late in filing your tax return, an extra 1% is added (up to a maximum of 12 months). Penalty charges still apply since they are not part of this interest relief.
The CRA can work with you and find flexible options to pay your balance owing. For details: Payments for individuals