These are the exact steps to pay regular remittance with Interac online banking

Canada Revenue Main Page - http://www.cra-arc.gc.ca/menu-eng.html

Click "My payment" - Direct Link: http://www.cra-arc.gc.ca/esrvc-srvce/tx/mypymnt/menu-eng.html?bsn

Press "Start my payment"

Press "Continue"

Press "Payroll Source Deductions" - https://apps.cra-arc.gc.ca/ebci/fppp/mypymnt/prot/slctRvnLn.do?rl=revenu...

Choose Remittance type (usually Regular)

Enter Account#
Gross Payroll
Number of Employees
End of Period
Amount

Press "Continue"

Choose your banking institution - it will prompt you to login

Confirm the payment.