Troubleshooting steps for QuickBooks Error 103. If you are a new user and want to add a new connection, then you must create an account first. The steps for the same are given below:
Go to the Transactions tab, followed by the Banking tab.
Then, on the Banking page, you need to click on the Add Accountoption.
Then, here in the Search field, enter or paste the bank’s URL.
Now, you will see the option saying, New connection with a different login among the other options.
Then, to access the website of your bank, you need to manually enter your login credentials.
Next, connect your QB account to your bank account by hitting on the Connect button.
In this way, you would be able to add an account with new connection in QuickBooks.