I need to change personal details on our invoices. I can't find the Custom form styles page. It's disappeared?

Hello and welcome to the Community, trhamley

We're not aware of any issues accessing custom form styles in QuickBooks Online at the moment.

QuickBooks uses browser cache and cookies to run faster. But sometimes these can also block web pages from loading as expected. 

To check for any issues that may be causing this message, please consider clearing the cache and Intuit-specific cookies on your web browser or open QuickBooks in a different browser. 

To access custom form styles, click here or select the Cog > Custom form styles in QuickBooks. If you need any further support, please get back in touch below!