The Linked Accounts dialog appears when Express Accounts is missing information about crucial accounts. In order to create invoices, customer payments, and business purchases, Express Accounts requires account numbers for the following accounts: Deposit Account, Accounts Receivable, Accounts Payable, Income Account, Expense Account, Freight Collected, Freight Paid, Sales Tax Collected, and Sales Tax Paid. You can enter your new account numbers/description, or you can select from existing accounts in the Chart of Accounts. If you want to change the linked account settings, you can do so by going to the Options -> Accounting page and clicking the "Link Default Accounts..." button.