Thank you for posting your concern here in Community, @hansae13.

Here are the steps to resolve the email and printing invoice issue. We can perform these troubleshooting steps using QuickBooks Tool Hub. This tool can help you fix common errors. Just remember to close QuickBooks before using the tool hub.

Here's how:

First, you'll need to download the most recent version (1.6.0.5) of the QuickBooks Tool Hub. Then follow these steps to proceed:

1. Open the file you downloaded (QuickBooksToolHub.exe).
2. Follow the on-screen steps to install and agree to the terms and conditions.
3. After the installation finishes, double-click the icon to open the tool hub.

Next, run the Quick Fix my Program in the Tools Hub.

1. In the QuickBooks Tools Hub, click Program Problems.
2. Select Quick Fix my Program.
3. Start QuickBooks Desktop and open your data file.

Moreover, if you want to manage your customer transactions and ensure accurate bank deposits, you can refer to this article: Take and process payments in QuickBooks Desktop.

Feel free to ask if you have any follow-up questions about email later and printing your invoices in QuickBooks Desktop. We're always here to lend a helping hand.