Tax deducted in India and Malaysia

If a person worked 8 months in India and tax deducted for that period and have from 16 for the 8 months and he joined Malaysia company and doing work from home from India for the rest of 4 months and tax has been deducted by the Malaysia company for the 4 months.  My questions are

1. Is it necessary for the person to include the tax deducted by the Malaysian company in their Income Tax Return (ITR)?
2. Which ITR form should the person file, and where should they report the tax deducted by the Malaysian company in their return?

Thanks in Advance