It's June, and you should have received your property tax notices in the mail, with property taxes due at the beginning of July. If you have your taxes collected by the mortgage company, you still need to apply for any eligible homeowners grant on your property tax notice. Complete the grant and return the tax form to your municipal office or city hall - they know your taxes are being paid by the mortgage company, but they still need your grant information to compute your NET taxes owing. The mortgage company can then pay the tax funds collected over the year on your behalf and all should be well!
If you pay your taxes on your own of course, you can just apply for the grant and remit your payment directly to your tax office.
If you would like to change the amount of taxes being collected with your mortgage payment, talk to your Mortgage Provider's Servicing Centre.