I can see the importance of sending out an invoice, @TWCEastSussex.
No worries, let me assist you with this and provide you with further help.
Our UK support hours in QuickBooks Self-Employed (QBSE) have a specific allotted time which are only available from Monday to Friday, 8 AM to 8 PM, and Saturday/Sunday, 8 AM to 6 PM. That explains why you didn't get the chance to contact our live support.
In the meantime, let's perform some troubleshooting steps for you to be able to have the Save button again on your end. You can try logging in to your QBSE account using a private browser as it ignores websites from using cookies and doesn’t record any history and data. You can use either of these shortcut keys on your keyboard to access incognito mode:
- Safari: Control + Option + P
- Google Chrome: Press Ctrl + Shift + N
- Firefox or Internet Explorer: Ctrl + Shift + P
If this works, it means you have to clear the browser's cache so the system can start fresh. If you get the same result, I recommend switching to a different supported browser as an alternative.
Furthermore, here's an article you can always browse in case you need assistance entering sales income and expenses: Manually add transactions in QuickBooks Self-Employed.
I'm only a few clicks away from assisting you with your queries, looking forward to having you again here in the Community. Have a good one.