@j_m1 , agreeing with @DaveF1006 , -- since you have an SSN, you provide that along with W-9 requested by the entity -- the income and the return you file ( which will now be on 1040-NR , because you are non-resident alien , having abandoned your stay in the USA ). The Note about "use only with DHS permission " is only for purposes of providing this to employers in the USA -- i.e. use as a "permission to work". For tax return purposes though as long as your SSN is valid ( SSN's are generally not re-issued by SSA , I think as long the holder is not reported as demised and then also after a huge number of years ), it can be used as Tax ID Number ( TIN ).
For US tax purposes you cannot use any other ID except SSN or ITIN ( issued by IRS ) or ATIN ( issued by IRS , temporary use ) . Your home country tax id cannot be used ( IRS computers also will not recognize the format and will definitely reject the return).
Note that because your current status is Non-Resident Alien, having passive income ( stock award, dividends, sales of stocks etc. ), you may have to file a form 1040-NR ( not supported by TurboTax) for any realized income from US sources. The awarded stocks ( depending how / why transferred ) may or may not result in a tax event for US tax purposes, but any incomes generated by these would definitely be a taxable event for US purposes , irrespective of local tax laws .
Does this make sense ?
