What do I do if the client isn't receiving my invoice sent through quickbooks self employed? I have tested it with my own email and it definitely doesn't work.

I admire you for testing it in your email address, Finton.

Let's perform a few clicks to isolate and fix this issue. I recommend accessing your QuickBooks Self-Employed (QBSE) account in a private or incognito window. This way, we can check if this is a browser cache issue.

The browser uses cache to swiftly load pages faster. However, too much of it causes issues that affect the performance of your account. Using a private window helps us verify the issue as this doesn't save any data files.

To open an incognito window, you can refer to these keyboard shortcuts.

• Press keys: Ctrl + Shift + N (Google Chrome browser)
• Press keys: Ctrl + Shift + P (Mozilla Firefox & Microsoft Edge browser)
• Press keys: Command + Shift + N (Safari browser)

Once open, log in to your account and send a sample invoice to your email to double-check. If you're able to receive the invoice, I suggest going back to your regular web browser and clear its cache. If this is not the case, I propose using other supported browsers to see and check if this is a browser-integrated issue.

Once your customer pays their invoice, you'll want to mark it as paid. I'll show you how.

1. Go to the Invoice menu.
2. Locate the invoice you want to mark as paid.
3. Select the drop-down arrow menu under the ACTION column.
4. Then select Mark as paid. 

If you're using QBSE mobile app, you'll want to ensure the application is up to date. This way, we can guarantee the app is running on the latest features and fixes and for a smooth transaction.

I'm always around if you need additional help sending your invoices. You're always welcome to tag me in your reply. Take care!