The invoice now function allows you as an installer to invoice the job simply and easily. For full instructions check here.
There are a few fields on the profile page (settings/my profile) that need to be completed before using the function.
Business details, including company name, address and phone number should be filled in.
If you're GST registered that needs to be 'ticked' and your GST number filled in.
Once completed hit 'save'.
These details will now automatically populate on all invoice's that you create.