Error code 103 getting when users connect your bank to QuickBooks Online or QuickBooks Self-Employed. This error usually means the user ID or your secret password is incorrect for the bank account when you’re trying to connect.

Steps to Resolve Banking Issue 103

Verify your credentials (user name, password)
Open Bank website in a new window
Enter your login details
Then logout from bank website
Now open Quickbooks online and enter the same username or Password
Update sign-in information

Go To Banking option
Click Edit sign-in
Open bank site
A new window will open >> see you account details
The access your account through the website

Select Banking.
Locate the card for the account that generated error 10
Select the pencil icon Edit
Go To Edit sign-in info
See your account to connect with your bank
Enter your new login details and Update it

Banking Error 105

Error Code 105 banking error it occurs due to the bank's website downtime. Main reason information cannot be exchanged between the banking website & QuickBooks Online between the server.

Steps to Fix QuickBooks Banking Error 105:

In QuickBooks Online
Sign in to QuickBooks Online
Go to Banking option
Choose Transactions button
Select Update

In QuickBooks Self-Employed
Sign in to QuickBooks Self-Employed
Select the profile go to setting
Select Bank accounts
Update all