Use the Accounts & Banking Linked Accounts window to change your Accounts and Banking linked accounts. (To find the Accounts & Banking Linked Accounts window)
An entry is required for each field in the window; if you wish to unlink an account, you must enter another account to replace it. If you're unsure of the account you want to use, click the search arrow. A selection window listing all your accounts will appear, and you can select the account you want to use.