Hello jenniet873,
The values in the BAS are determined automatically from the transactions for which GST tax codes were assigned. To complete your BAS, you still need to prepare, record, and lodge it in QBO. Remember that lodging a BAS doesn't file that BAS with the ATO electronically. You can use the statement to file and pay it manually. For more information about this, you can check browse this article: Lodging a BAS.
If you have clarifications about the filing process, it'd be best to consult your accountant about it. They can give you options on how to do this that will suit your business set up.
Feel free to get back to us if you need anything else. Have a great day!
