We received a query from our importer. They used ATO-CAC (CAC = Client Activity Centre) system under Australian Customs and Border Protection Service to check our Trading Name / Business Name of GST registration was expired, not entity GST registration. I understood it is not necessary to register business name as GST registration.
They needed ABN/CAC to fill in form N10. https://www.abf.gov.au/help-and-support-subsite/Guides/doc-import-declaration-guide.pdf
They captured a picture and showed our GST registered of "trading name" was expired. Someone said it related to ABR not ATO. How can I rectify it? Please advise.