Hello!I am an individual developer from Germany and I have some troubles filling out the "U.S. Tax Forms" document in iTunes Connect. I am on the page whose headling is "Manage Your Tax Information" and these are the points I am not sure what to do:5. U.S. taxpayer identification number, if requiredI do not have a US taxpayer ID. Can I just leave this field empty?6. Foreign tax identifying number, if anyI have a german tax Id (Steuer-ID). Do I have to put this german tax Id into this field? Or do they mean something different?7. Reference Number(s)What is this reference number?Part II: Claim of Tax Treaty Benefits: (If Applicable)9. I certify that the beneficial owner is a resident of Germany within the meaning of the income tax treaty between United States and that country.Do I HAVE to check this box as developer from Germany? Does this mean I automatically get a reduced tax if I check this box?10. Special rates and ConditionsDo I fill out any the boxes here?Sorry for all the questions, but I do not want to make any mistake. Thanks for any help!