Before adding any form, navigate to client "Settings"
Settings --->General Settings ---> Contact Details Settings ---> Tax
Then you can proceed adding a form.
Select Form that you need
"Lodgement Date" can be change as required.
Then, fill the Form with the specified information.
After filling the for, click "Validate" to check missing field or error, then select "Complete" if form is ready.
It will notify you if the form has error or form is Valid.
or it will show an Error if in case you missed something.
Checkout some of our Help guide on:
Form Workflow Sequence and E-signature