You might notice some forms in your compliance list with a status of Non-lodgable. This includes the following form types:
Form N — annual PAYG instalment notice
Form R — quarterly PAYG instalment notice
Form S — quarterly GST Instalment notice
Form T — quarterly PAYG and GST instalment notice.
By default, non-lodgable forms are locked in the Compliance list, so they can't be edited.
If your client is paying the amount advised by the ATO, then these forms don't need to be completed and lodged. If you're varying the ATO's instalment amount, you'll need to unlock the form to edit and lodge.