Trouble with imported transactions - Transaction Details is not allowing me to select any account, so I cannot mark the bills as paid (It used to work just fine for me)

Thanks for sharing detailed information, MrNobodySpecial.

One possible cause you're unable to mark your bills as paid is a damaged company file. Rest assured that I've got the steps to resolve this.

To begin, let's ensure that QuickBooks is on the latest maintenance release. Follow this article on how to update the software: Update QuickBooks Desktop to the latest release. 

Once done, open your file and mark a transaction as paid. Check if the drop-down box will appear. If the same error occurs, let's use the Rebuild Data tool that can fix minor and common data issues. 

Here's how:

1. Go to the File menu, then click Utilities.
2. Select Rebuild Data.
3. Click OK, then follow the onscreen steps to save a backup.
4. Let the tool repair your file. It may take some time. QuickBooks may seem stuck, but as long as you can move your mouse, the tool is working.
5. When the tool finishes, select OK.
6. Then go to the File menu and then select Utilities and select Verify Data.
7. Let the tool check your file for data issues.

Then, let's rebuild your data. I'll guide you how.

1. Select File, Utilities, then Rebuild Data.
2. Back up your company files to start the rebuild process.
3. Press OK when the "Rebuild has completed" message appears.

Once done, you'll want to select the bills to mark as paid and enter the necessary details. You can also check out this article for more helpful information about the process: Verify and Rebuild Data in QuickBooks Desktop.

You may want to consider adding and matching bank feeds transactions in QuickBooks Desktop. Doing so will keep your books accurate.

I'm always here to lend a hand. Your success with QuickBooks is my top priority. 

Hi @MrNobodySpecial , in addition you could use this tool for easier import export data https://transactionpro.grsm.io/qbo . Glad to assist you.

Nope