If you clicked Check Later on the SBR Countdown Timer window, you can use a Batch Pull request to receive the response from the ATO. This is how you can manually retrieve the response.
Log in to HandiTax.
From the Lodgment menu, click Pending Validations from Lodgment.
Highlight the transaction to be pulled from the ATO.
Enter your Credential Password and click Retrieve.
Note: Only the person who lodged the original response can retrieve the validation.