Retirement benefits

Hi,

I have a query,
The assessee is deceased and his Indian return is to be filed for AY 2012-13. His Indian income is above basic exemption limit. The assessee was a USA tax resident and paid tax on his global income in USA. The assessee has paid tax in USA on Retirement account as well as on Social Security account(both of these are income from USA only) Will he be able to take credit of these taxes in his Indian Income Tax Return as per DTAA???

Please reply

Regards