@sherman-mike , while I am not familiar with the screens of the on-line product, but assuming it is quite similar to the Windows version:
Under the income tab, where it asks for whether you want to be guided , you choose "I will choose what I work on". This would result in one screen that asks about W-2, choose " I don't have a W-2 " and continue. The next screen should show a list of all different income categories. Here near the bottom you will see "Foreign Earned Income and Exclusion" -- choose this . Now TurboTax will walk you through filling out form 2555.
Hope this works for you . Is there more I can do for you ?