Hi Natalie and thank you for your question.
The text book uses the example of the September quarter of 2017 as that is when it was written.
Xero’s Demo Company is reset each month so you will find all the transactions in the month when you first logged in, until it resets.
accordingly, to prepare a BAS that has figures in it, prepare a statement for the current quarter.
Post back here and let us know how you go.
Trainer and Assessor