Hi ICEGM,
I can see how helpful it is to be able to create an RCTI (receipt created tax invoice) in QuickBooks Online version, the direct way for the recording of this is not yet available. I have already submitted the product enhancement request to our Product Development Team so we can look into this further. We cannot provide any turnaround time as to when this will be available but what we do here is that, we have a product/feature release at a specific time - every month and hopefully we could include this feature soon.
You may also check our feature enhancement implemented for the past periods through the link https://quickbooks.intuit.com/au/product-updates/
For the mean time, you may follow the RCTI invoice format from ATO and record the full amount of sales as invoice in QuickBooks Online then taxes paid as expense.
Post again in the Community if you have more questions, I'll be here to help you.
