Hi

In 2009, I exercised options granted by my US-based company. Per the Substantial Presence test, I qualify as a US-resident (returned to India after 2 years in Q3-2009).
I exercised my options both while I was in the US and after returning to India. In all transactions, taxes were withheld both in the US and India (in all cases, approx 1/3 was US tax, 1/3 was India tax, and I received the remaining 1/3). I will file my US taxes (including the 1116 Foreign Tax Credit form) in Feb. What Tax credit can be claimed in my US tax returns for 2009?

You should claim the taxes paid to India on the options.