As a general rule, you may mail a paper check separately from your e-filed return. MTO allows you to print a prepopulated payment voucher for SUW taxes and MRE taxes.
DO NOT SEND A COPY OF YOUR E-FILED RETURN WITH YOUR PAYMENT.
After filing a tax return showing a payment is owed, MTO will prompt you to make an electronic payment. If you wish to mail a payment, you will click “Cancel” on the “Would you like to make a payment” pop-up modal.
You will be returned to the “File and Pay a Tax Return” page. On the right-hand navigation pane, select “Other Payment Options”. Under “Make a Payment” select the “Payment Voucher” section of the page, a list of prepopulated printable payment vouchers are displayed; select the appropriate one for the period. If the return period you are looking for is not listed, select the appropriate link to print a blank payment voucher that you may complete prior to mailing with your payment.