I can't save or send invoices or record payments

Hello there, @neventracy-gmail.

Let's get this issue resolved. First, may I know if you've received an error message? Any information can help us resolve the issue.

In the meantime, let's access QuickBooks in an incognito window and save or send invoices from there. It's where we can identify if the issue is browser-related.

Use these keyboard shortcuts to launch a new private window:

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

If it works, go back to your regular browser and clear its cache. You can also use another supported browser to identify if the issue is browser related.

I've added this article about personalising sales forms and managing payments in QuickBooks: 

• Customise invoices, quotes, and sales receipts in QuickBooks Online
• Manage payments

Let me know if you have other concerns about sales forms in QuickBooks. I'm always here to help. Take care.