Invoice cannot be entered, it gives error

Thank you for contacting us, cemaleddin-yildi.

Would you mind giving a screenshot of the error you receive when creating an invoice? This would help me provide the exact information you need to fix this issue.

For now, clearing cache and cookies on your regular browser is the first step to take. This will help isolate and fix the unexpected issue.

The following links below will guide you through depending on your browser:

• Firefox
• Google Chrome
• Safari for Mac
• Safari for iPad and iPhone
• Microsoft Edge
• QuickBooks App for Windows and Mac

After clearing the cache, make sure to restart your browser for changes to take effect.

You can also refer to this article: How to delete browser cache and Intuit-specific cookies for other troubleshooting steps and additional information.

Keep me posted, and I'll be waiting for your response. Thank you and take care always!