How can I connect my bank account? Error 508 showing.

Hi there, orders-arcanecry.

I appreciate you for sharing detailed information about your concern and for performing several actions to resolve the bank connection issue. I'll ensure you'll be routed to the right person to assist you further on this banking error you've received.

There are certain bank errors that block QuickBooks from connecting to a bank account or downloading new transactions. Since the issue persists after performing some troubleshooting steps, I recommend contacting our QuickBooks Support Team. They have the tools to pull up your account in a secure environment and be able to investigate the cause of the 508 error and why the connection failed keeps happening.

Here's how to contact them:

1. Sign in to your QuickBooks Online company.
2. Click the Help (?) icon.
3. In QB Assistant, enter the topic you need help with. You can also enter questions.
4. Click Contact Us to connect with a live support agent.
5.  Select how you want to contact them and fill in the information.

Lastly, you may refer to this article to view various steps on how to find missing transactions downloaded from your online bank and credit card accounts: What to do if you can’t find downloaded transactions in QuickBooks Online.

I'll be right here to continue assisting if you have any other concerns or additional queries about bank connections. Just click the Reply button below and I'll get back to you, orders-arcanecry. Have a nice day!