Thank you for reaching out to us, @Ash-harris.
I'll be happy to answer your concern about invoice.
You're already on the right path.
Here's how:
- Select Settings then Sales Forms.
- Select the Customize Invoice template.
- Follow the onscreen steps to change your company's default logo, etc.
You can also check on how to customize in QuickBooks Online for more information about invoices.
We're always here in the Community to help. Stay safe!