I can see the urgency to fix this quickly, Finn.

It's possible that you're unable to email several transactions because the pop-up windows are being blocked. This could be due to a browser issue. To fix this, we need to perform some basic troubleshooting steps. The specific steps may vary depending on the browser you're using.

To check pop-up blockers for Firefox, here's how:

1. Open Firefox, select Menu ≡, then select Settings.
2. Under Privacy and Security, Scroll down to Permissions.
3. Go to the Block pop-up windows uncheck the box, or select Exceptions and add qbo.intuit.com as an exception by clicking on Allow.
4. Select Save Changes.
5. Once adjusted, sign out, close Firefox, reopen it, and sign back in.
6. Try accomplishing the task you were blocked from before.

For Google Chrome: 

1. Open Chrome, look for More, then select Settings.
2. Select Advanced.
3. Under Privacy and security, select Content settings.
4. Select Pop-ups and redirects.
5. Switch the setting to Allowed or Blocked.
6. (Optional) If you prefer to keep pop-ups blocked, add an exception for QuickBooks Online instead:

• To the right of Allow, select Add.
• Enter qbo.intuit.com.
• Select Add.

For Safari: 

1. Select Safari, then select Preferences.
2. Select Security.
3. Uncheck the Block pop-up windows box to enable pop-ups.

Once everything's settle, you can browse through this article in case you need assistance managing transactions: Enter Batch Transactions.

If you still have further queries about sending an email to your customers or anything else about QuickBooks, don't hesitate to let us know by leaving a comment below. We're always here at any time. Stay safe.