When does a corporation have to pay its taxes (corporations in Quebec)?

You must pay your taxes two months after the end of the tax year for provincial to Revenu Québec, and two months after the end of the tax year for federal to Canada Revenue Agency. There are some exceptions as to the federal, where the balance of tax is due three months after the end of the tax year.

You can visit the following websites for further information:
https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/corporation-payments/paying-your-balance-corporation-tax/balance-day.html

http://www.revenuquebec.ca/fr/entreprise/impot/societes/declaration/dela...

However, if your corporation 

Here is a link on the matter:

https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/corporation-payments/paying-instalments.html