@Opus 17 I think the question is about RSU's that have vested already, not about yet-to-be-vested RSUs. Let me lay it out:
Employee is an alien with no US green card who is working in US since Jan 2017
RSU's were granted on 1 Jan 2018
All RSU's were vested on 1st Jan 2019 and employee paid income tax in the US
Employee relocates from US to India on 1st Jan 2021 (2 years after vesting of RSUs) i.e. becomes a non-resident alien
He sells his vested RSUs on 1st Jan 2022 ( 3 years after vesting of RSUs - but he's in Europe now )
Question - where / how will the capital gains be applicable - India or US? Will US broker withhold any tax? Employee does not have any other source of income in US.
