I am filing form 5472 along with 1120. On the form Part III for related party, US Identifying number I enter Not applicable. On the critical diagnostics it says valid values are SSN/EIN /Foreign US/Applied for.. I don't know what's Foreign US but all other are not applicable because the related party is not operate in the US. Should I just use Foreign US to resolve the error? The text 'Foreign US' gets printed on the form