Do you have US taxable income? I don’t think you ever said.
If you don’t have US taxable income, then you don’t file any tax return and you don’t need an ITIN. The IRS probably won’t even issue an ITIN if you applied for one.
If you do have US taxable income, then you will file a 1040-NR. This form is not supported by TurboTax, you will need to find another tax provider. You will also need to apply for an ITIN using form W-7. Download and print the form W-7 and its instructions. Mail the completed 1040-NR, the W-7, and any proof of identity required according to the W-7 instructions, all to the address for processing W-7 applications. After the IRS issues the ITIN, they will process your tax return.
