CMN.ATO.GEN.438065 - Declaration signatory identifier is required.

Solution:

You need to click the gear leaver , top right. Select Settings. Ensure you are the signatory. (See example attached). If your name is not there in the signatory field, first add yourself as a client.

Select "Settings", Ensure you are the signatory.

If your name is not there in the signatory field, first add yourself as a client.