Good to see you again, Koala.

Yes, fields that doesn't have any data will not be printed if you're using the templates in QBO. On the other hand, fields without data on them will be visible if you're using the template that you've customized and imported. 

Also, you can only use one company address across all invoice templates if you will be using the one provided by QBO. You might want to use the import option so you can add multiple addresses.

I'll be around if you need anything else.