I've updated my customers details and it's not reflecting the invoice. Is there a way to fix this? I've already updated the app.

I appreciate for performing the initial steps to resolve your concern, @emmanuela. To ensure I can provide the best solution, I have to ask for more details on what you're experiencing.

May I know if you're using the mobile app version or the desktop app for Windows or Mac? Have you tried opening QuickBooks Online (QBO) via the browser to check the invoice? What specific customer details are not showing up on the sales entry?

Thank you in advance. Have a good one.