When it comes to appointing us to act as your tax or BAS agent for another entity (other than yourself) then we need you to do a nomination to the ATO first.  Only authorised contacts can add the nomination and you can find detailed instructions on the ATO website here:  https://www.ato.gov.au/agentnomination.

You can also download a pdf version with the step-by-step instructions here:  How to Nominate an Agent in ATO Online Services for Business