Let me share some information about invoices, @canariocollectio.
After updating the company address, changes will automatically apply on prior and future invoices.
However, if you used an imported template and already set the company address on that one, that’ll will not be included in the update.
Here's more information on how to customize invoices, estimates, and sales receipts in QuickBooks Online.
You can also refer to the following article on how your invoice emails will look like to your customers: Customise your invoice emails
I'm always here to provide help and answer any questions that you may have. Have a great rest of the day!