Hi khasick,
Thanks for posting in the Community!
QuickBooks Online can only round up and down your GST total amount to its nearest dollar and up to 2 decimals. The 2-decimal rounding takes place in the amount fields. In order for the amount field to show a 2-decimal figure correctly, it is by design that the precision/calculation needs to happen in the Rate field. Therefore some situations customers can see the Rate field has a figure with more than 2 decimals. We understand that this may cause inconvenience. While this is by design, we have raised the situation to our Product Team for future enhancement.
With regard to editing the BAS journal, I'd recommend consulting your accountant in this process to avoid messing up your books and BAS in QuickBooks Online.
Post again in the Community if you have more questions. The team is here to help you!
