Hello lbendall,
Welcome to the Community! I understand you wanted to remove the previous BAS period in your history. Allow me to provide some information about BAS lodgement in QuickBooks Online.
After you've lodged a specific BAS period and recorded a payment in the GST center, the BAS period lodged will move to the History tab of your GST center.
If you want to delete the previous BAS, please be advised that all BAS amount is based on the transactions recorded in QuickBooks Online coded with GST tax codes. And you'll have to either edit the transaction and set to Out of scope tax code or delete the transactions.
If you're referring to undoing the previous BAS period lodged, we'd recommend contacting our Customer Care Team to request the BAS period to be unloged/undo.
You can also check these links below:
Feel free to reply to this post if you need more help with your BAS. I'm here to help. Have a great day!
