Trying to edit details on invoice, select edit & only goes to white page & wont open

I'm here to help you sort this out, julie860.

Excessive cache in your browser might be the reason why you're unable to modify your invoice. We can press the F5 key to refresh the page. If you're getting the same result, we can edit the invoice using an incognito window. Please use these keyboard shortcuts depending on the browser you're using:

• Google Chrome: press Ctrl + Shift + N  
• Mozilla Firefox: press Ctrl + Shift + P
• Internet Explorer: press Ctrl + Shift + P
• Safari: press Command + Shift + N

If you're able to modify the invoice, let's clear the browser's cache to start the system fresh. Also, switching to other supported browsers could help.

I'm adding this article if you want to customize your sales forms in QBO for your reference: Customise invoices, quotes, and sales receipts in QuickBooks Online.

I'd appreciate it if you could update me on how the steps work. I want to make sure this is taken care of.