@firstfiler , you have to provide more information for one to understand why your adjusted basis should be zero. Please tell --- what foreign source income, what type, which country, how much tax etc. Are you trying to do the whole thing in forms mode or you are just correcting items .
Will circle back once I hear from you. If the answer to your prob. is not obvious from your detailed answer, then I will need enough to simulate and see what Turbo is doing.