Thanks for joining this thread, and I'm here to help fix the error on your Banking page, manderson42.

The Error 103 means the user ID or password is incorrect for the bank account you’re trying to connect.

Let me provide the steps on how to fix it:

Step 1: Confirm your sign-in info is correct

It’s always good to make sure you have the correct user ID and password for the bank account:

1. Open a new window in your web browser and go directly to your bank’s website.
2. Make a note of the web address (such as https://www.flagstar.com). This may come in handy later.
3. Sign in with the user ID and password you have.
4. If you have separate accounts with the bank (such as a business account and a personal account), sign in to the account you want to fix in QuickBooks.
5. If you sign in successfully, then you can take note of the user ID and password.
6. If you get a sign-in error, follow your bank’s instructions to get your user ID, reset your password, or both.

Step 2: Enter your bank sign-in info in QuickBooks

1. From the left menu, select Banking.
2. Select the bank or credit card account you need to update.
3. Click Edit ✎, then Edit sign-in info.
4. If your web browser auto-fills the user ID and password fields, clear them. This ensures your browser doesn’t put in old info by mistake.
5. Manually type in the user ID and password for your bank account.
6. If your bank offers a Show option, select it so you can confirm you entered the password correctly.
7. Click Update.

You can refer to this page for additional information: What to do if you get a bank error or can't download transactions in QuickBooks Online.

Keep me posted on how this goes by commenting below. I'll be around until you're able to fix the Flagstar connection in QuickBooks.