33 (1) When the Ontario court receives a support variation application under paragraph 2 of section 32, the clerk shall serve on the respondent, in accordance with the regulations, (ontario.ca)
The Court of Appeal rightly clarified that the entitlement of having approximately equal incomes is not the primary criteria in variation applications. (slaw.ca)
If you want to vary your withholding amount downwards, you need to lodge a PAYG withholding variation application form with us. (ato.gov.au)