I hope you're doing well, ryan-harrington-.
QuickBooks is still partnering with Exactor to allow electronic filing of BAS. If you're unable to see Exactor* from the list of software service providers, I recommend calling the ATO directly. They can help you with the connection.
You can also read these articles for more information:
In case you need help with other task in QuickBooks Online, you can visit our general help topics page and looks for articles and guides.
You can also leave a reply on this post and I'll be glad to help you out again. Have a good day!