I am going to quote two previous posts below that have spoken into this thread but I don’t think are being address. I have already worked with Shopify support and they don’t understand the issue either. I have also worked with QB support and they sent me to Shopify. I believe it is related to the authorization process on QB side. Support on both QB and Shopify side keep referring to app integration but I don’t believe this is the problem at all. The method we use to integrate any other bank account or credit card account has nothing to do with apps. We follow a completely different process to connect a bank account. And that is the same process we have always followed to connect a Shopify Balance account. And in the past it always worked. It has only been in the last 5 months that it has stopped working. As mentioned below, my Shopify store integration is working fine. It is only the Shopify Balance bank account that is not connected. QB needs to look at this in the same way they would if customers were unable to connect their Wells Fargo bank account. I have tried the incognito solution and clearing cache. It doesn’t work. Here are the quotes I mentioned above.

@JanbonN 

“Anyway, this needs to be escalated to your engineering team to figure out why the QBO OAuth process is failing after authenticating with Shopify. There are a lot of us who use the Shopify Balance account as our primary bank account as it is easy, integrated with our Shopify stores and doesn't require the ridiculous steps that classical business checking accounts still require in 2024.”

@RCV 

“This isn't an App Integration issue. When we're talking about Shopify Balance, we're talking about a bank account that we're trying to add, not general Shopify store integration. You know how Quickbooks has "Quickbooks Checking Account?" Shopify has the exact same thing, except it is called "Shopify Balance. We have a routing number, an account number, and you can do ACH withdrawals and deposits using them. When I try to connect my Shopify Balance banking account so it appears along with my Wells Fargo Business Checking Account, it doesn't work. Not that it gives an error, it just fails immediately after trying to sign into my Shopify account in the window that pops up.”

Thank you for working to get this issue solved. We appreciate your work.