Foreign Tax Credit

I received foreign income - only through rental income from foreign property and from selling some mutual funds. I did not perform any work or receive any tax forms from outside of USA. I also paid and filed foreign taxes on that income (in India). From my understanding there are double taxation considerations and I should not have to pay taxes here on that income - correct? but when I entered the information about rental income - it dropped my refund to amount owed. Please help on how to fill the foreign taxes forms.