Account and Setting screen seems empty. So ı am not able to change my currency setting

Welcome to the Community space, ipektenselcuk. I'll share some troubleshooting steps to verify the reason behind the empty screen.

Let's start by accessing your QuickBooks account via incognito or private window. This mode doesn't retain cache, so we can verify if it is a webpage issue. Use these keyboard shortcuts:

• For Firefox, press Ctrl + Shift + P
• For Chrome, press Ctrl + Shift + N
• For Safari, hold down Command + Shift + N

If this works, clear the browser's cache to start with a clean slate. You can also utilize other supported browsers as alternatives.

Here's an article you can use as a reference to do business in foreign currencies: Set up and use Multicurrency in QuickBooks Online.

You'll want to explore how to adjust your home currency regularly to stay current with the most recent foreign exchange rates. Please take note it's only available in QuickBooks Online Essentials and Plus.

For more assistance in handling foreign transactions, get back to this thread. I want to ensure everything is taken care of. Have a good day!