I am trying to link my bank with santader, it accepts on santander then says on your end "oops unable to conntect bank" i have tried multiple times

I understand how frustrating it is when a bank link fails after multiple attempts. You can usually clear up this type of connection hiccup by checking your bank's portal for any active advisories or maintenance. If everything looks good on your bank's end, access your account in an incognito window or a different browser and make sure your internet connection is stable. 

If the issue persists, I recommend contacting our QuickBooks Online live support team so they can check it with their tools and get it fixed. 

Please leave a reply if you have any other questions or concerns.