The Tax Department is streamlining withholding tax and wage reporting forms and Web File applications. If you have any doubt about the requirement to withhold, go ahead and do it and use a Form 1042.You must make all deposits of taxes paid with respect to Form 1042-S (including taxes withheld under either chapter 3 or chapter 4) electronically. If services are performed in the US, income is USsourced. U.S. companies should not withhold taxes from money paid to independent contractors working overseas. Withholding agent doesn't know the tax residency. In general, if a withholding agent cannot reliably associate a payment with valid documentation (e.g. Form. When do I need to ask a contractor to fill out a W8 BEN form? In that case, a US company should not withhold or report taxes.