I'm learning online. Making mistakes and corrections to one invoice. When I save its sends this inv to client. How can i prevent sent until correct inv can be sent ?

Welcome to the QuickBooks Community, fransvdwalt789-g. I'll be sharing details on how creating an invoice works in QuickBooks. Also, let's perform steps so you can ensure that your client will only receive a transaction once.

When you enter an invoice in QuickBooks, there are several options for saving or sharing the entry. It could be that the second time you made a correction to the invoice, you click the Save and send button that's why it was sent twice to your client.

To avoid this situation in the future, I recommend pressing the Save or Save and close button while making changes to the invoice. This assures that it will not be sent to the client. When you're finished and ready to send the invoice, choose Save and send to email it to your appropriate customer. You may refer to this article to see additional details: Create invoices in QuickBooks Online.

Lastly, I'm adding this article to see details on how the Sales page gives you a great at-a-glance view of the status of your sales transactions: View sales transactions in QuickBooks Online.

Please feel free to leave a comment below if you have other concerns about managing invoices in QBO. I'm always ready to help. Take care, and have a great day, fransvdwalt789-g.