Filing T4A without client payroll account

My T4A are getting rejected. The client has subcontractors but no payroll, therefore no payroll account. Tried RC, RP adn RZ - nothing works.
Any suggestions besides putting this in the mail?

T4A slips are filed under a RP account. Not necessarily payroll, but that’s what the system requires.

So does this mean I have to create an RP account for the client?

Yes - Use the BRO section of RAC.