How can I update my ABN? Clare del Rosario 18 September 2019 00:01 Head to your ID Check (also found in the menu under your name) and click ABN. Delete the number and add your new ABN or search your business name. Click the matching record and click Update. Related articles How do I edit my Profile? Who can I chat to about my account? Does my Credit expire? Responding to a bad review How do I unsubscribe from emails about Finstro? Comments 0 comments Please sign in to leave a comment.