I was deputed to USA from 1st April to 2nd Nov. 2017. For this period, my employer deducted taxes in USa and India for the same salary. Is it correct

I was deputed to USA for 7 months (1 APR to 2 Nov, 2017). During this period my employer deducetd taxes in India and USA resulting in 55% of tax on the income for these 7 months. I consulted my Charted accountant and he has clarified that employees worked outside India for 183 days or more, they are not required to pay the tax in India for that period. I provided the same information to my company and they have not accespsted it nor giving me any explanation. I feel that I am not treated fairly. I work for TCS.