How do I edit my Invoice template

Hello russelljstokes-b, thanks for reaching out on the Community 

Invoice templates can be edited in the Custom form styles section of QuickBooks Online (Take me there). To access, click on the Gear icon and select Custom form styles under the Settings menu. 

For further tips on how to customise invoices, estimates, and sales receipts in QuickBooks Online, click here. We'll be around if you need any further support!