Not a valid Web Connect file

One of the possible reasons why you're getting this error may be on your bank's end.  I'm here to help you sort this out, Marian.

You can contact your bank to check if they have ongoing issues or possible maintenance that prompts you not to manually upload your bank transactions. However, if the problem persists, I recommend contacting our support team to find out what's causing it. 

1. Sign in to your QuickBooks Online company
2. Select (?) Help.
   
   
3. Go to the Search tab, then type in Contact us.
   
   
    

In case you want to take a look and review the process of uploading your bank statement, I've added this handy article for your guide: Manually Upload Transactions into QuickBooks Online.

Additionally, you can learn how to review categories after transactions are automatically downloaded. Go through this article for more details: Categorize Online Bank Transactions in QuickBooks Online.

We also have our QuickBooks Live Expert Assisted team, dedicated experts who will help you clearly understand your business's financial status. Ensuring you're always informed and empowered to make the best decisions for your company.

If you need further assistance when uploading your bank transactions, you can reply below. I'm always here to help. 

@mariannegotz 

Try opening your QBO account on any private/incognito browser.

Same issue. Its only happening for one one month, May 2025! Every other month WILL upload. WTF. Same ongoing issues between these 2 terribly linked companies. We have transaction syncing issues every year, for many years.

Thanks for joining this thread, Bren123456.

I want to make sure you're able to connect your bank to QuickBooks Online.

Just to verify, were you able to try opening QBO in a private/incognito window and/or clear the browser cache? If so and the problem is persisting, I recommend contacting the QuickBooks Online Support Team. Agents have specialized tools, like the ability to share your screen, to take a closer look at what could be causing this issue. They would also be able to get this issue escalated for you if need be. 

You can review the steps to contact the team by visiting this link: Get help with QuickBooks products and services.

Please feel free to reach back out if you have any other questions. I'll be here to help in any way that I can.

I ended up having a client of mine working for TD actually fixing the problem for me because Scotia couldn’t do it and I was wasting so much time calling them.

It ended up being an issue with the coding sequence of the bank statement, I.e.: the order should have been a particular way and two lines were mixed up. My client figured that out by comparing line by line with a month that worked and one that didn’t.

Once he corrected this, the statement was accepted by Quickbooks as the correct file.

Hopefully this makes sense to you and that your issue can be fixed. Good luck!