Hi hbscoresby@optus, 

Based on the screenshot you've provided, it shows that you're trying to record a GST payment for your BAS ending 30 September 2021. If there are no transactions entered or imported before 30 September 2021, you may need to create a journal entry to record the total GST collected on sales and purchases via journal entry before recording a GST payment. Here's how:

1. Select  +New and then Journal Entry under Other.
2. In Line 1, enter the GST Liabilities Payable account.
3. Enter the GST collected on Sales on the Debits side.
4. In Line 2, enter the GST Liabilities Payable account.
5. Enter the GST on Purchases on the Credits side.
6. In Line 3 (if needed), enter your PAYG Instalment Liabilities (Pay as you go income tax) on the Debits side.
7. In Line 4 (if needed), enter your PAYG Withholdings Payable (Pay as you go tax withheld) on the Debits side.
8. In Line 5, enter the ATO Clearing account (or clearing account you use) and enter the payment amount on the Credits side.
9. Select Save and new to create a second journal entry to record the payment from the bank account.
10.  In Line 1, enter the ATO Clearing account (or clearing account you use) and enter the payment amount on the Debits side.
11. In Line 2, enter the Bank account the payment came from and the full payment amount on the Credits side.
12. Select Save and Close.

Let me know if that works well on your end. Thanks.