Email does not send invoices ?

Sending invoices is crucial for our business, River. I understand that you're unable to send them at the moment, and I'll explain why.

Before anything else, know that we recognize the urgency of this matter and want to help you get through this as soon as possible. We are currently investigating (INV-109301) the issue of invoices not being sent. Our engineers are aware of it and are now working on a fix. I recommend contacting our support team so they can add you to the list of affected users and receive updates once it's fixed. You can follow these steps to contact our customer care team:
 

1. Log in to your QuickBooks Online company.
2. On the upper right corner of your screen, click on Help (?).
3. Select or type Contact Us.
4. Start entering your concern, then select Let's Talk.
5. Please choose a way to connect with us:

• Assistant tab and select Talk to a human.
• Search tab and click on Contact Us to connect with a support expert.

In the meantime, you can download your created invoices and send them manually via another outside program. To proceed, here's how:

1. In the left panel, hit Sales.
2. Select Invoices, look for the transaction you want to download, then click Edit.
3. In the lower part of the screen, tap Print and Download.
4. Once saved, click the Download icon.

Moreover, once the invoice is paid, you can refer to this reference when recording the payment: Record invoice payments in QuickBooks Online.

The product engineers are continuously working on a fix for this concern. Should you need more guidance managing your business in QBO, you can always ask questions by hitting the Reply button or starting a new thread.