The mock-up that's featured in the 'Customise' section for invoices, differs dramatically to the .PDF generated - I am a designer, I need a cohesive brand image...

Hi hello31

You are able to import your own style of invoice, it must be created within the confines of the instructions and sample file.

Cog/gear icon > QuickBooks labs, turn on import style > cog/gear icon > Custom form styles > select the drop down arrow to the right of New Style > Import Style