Hello there.

I understand you're facing error codes when running custom reports and printing them. Rest assured, I'm here to help you resolve this immediately.

Many users, not just QuickBooks users, commonly experience the 400 Bad Request error code. When you're facing an Error 400 status code, this means that the server side will not process the request due to something perceived to be a client-side error, such as a missing or incorrect API endpoint or corrupted cache and cookies.

To fix this, you'll need to refresh the old data from your system and request new ones from the server side. Rest assured, these steps don't destroy any local files stored in your device. Here's how to do this if you're using a Windows PC:

1. Disconnect your internet connection from your device and close all programs, especially browsers.
2. On your keyboard, press Windows + R to open Run.
3. Type %temp% and press Enter.
4. Select all the files inside the temp folder and delete them. These are all temporary files that are saved in your computer starting the time when you recently turned on your computer. Deleting these won't affect any important files saved on your device.
5. If you see an error prompt saying, Unfortunately, this file can't be deleted as it's opened by another program, click Skip and restart your computer.
6. Open QuickBooks Online using any browser.

If the problem persists, I recommend contacting our QuickBooks Online support to have this case investigated thoroughly.

After pulling up customized reports in QBO, you can also consider setting a schedule and email information for a memorized report in your QBO account.

Please let us know if you have additional concerns about customized reports in QBO. We're always here to ensure your reports are accurate for your business. Have a great day!