Before setting the default Accounts Payable, you will have to make sure that the account intended to be set is of the Account Type "Accounts Payable."

Navigate to the Accounts list using the navigation bar on the left of the screen (1). Expand the Lists section and click on Accounts. Then, search for the Account you intend to set up as the Accounts Payable. If the Account type is listed as "Accounts Payable," (2) then this account has been set up correctly, and you can skip the next step. Otherwise, click on the pencil icon in the right most column of the grid to open the "Edit Account" screen (3).

If the Account type of the account was already "Accounts Payable" then you can skip to the next step. Otherwise, you should have clicked the edit icon to open the Edit Account screen depicted below. In the "Type" box, select "Accounts Payable" and then select the blue save button in the bottom right-hand side of the screen.

Now that the Account is set up correctly, you can follow the directions below to set the account as the system's default Accounts Payable.

1. Navigate to the system defaults page using the navigation bar on the left. Expand the Setup section and select "System Defaults"
2. Scroll down the the section labeled "AR/AP Accounts" and change the "Bill AP Account" value to the account that you set up in the previous steps
3. In the same section, change the "Bill Payment AP Account" value to the account that you set up in the previous steps
4. Scroll to the bottom of the page and select the "Save" option to save your changes