My invoices are not sending, these are customers i have invoiced before so there was no need to add a new email. i have double checked them and all looks fine

Hi userhillierearthmovi,

Thanks for posting in the Community! 

If the invoices not being sent are recurring invoices, let's check if they have reached the End date, or if the Interval schedule was changed by going to Gear icon and select Recurring transactions. Then, ensure that Automatically send emails on the recurring invoice template is also ticked so the invoices will be sent out. 

If it is not a recurring invoice, do you have any error message when you tried sending them? 

You can do the basic browser troubleshooting steps to check if this is triggered by a browser issue.

Let's start by logging in to QuickBooks in a private or incognito window. This will disable your cache from saving new data, and it’s a good way to check browser issues. 

Here are keyboard shortcuts you can use depending on the browser you're using:

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

If you can send your invoices, you can go back to your regular browser and clear its cache. If it’s the same thing, please try other browsers to isolate the case.

You can also check this article for additional reference: 3 solutions for when customers aren't receiving your emails.

Feel free to drop a comment below if you need further assistance with sending invoices. I'll be around to help.