How to receive payment as contractor in India while moonlighting in an IT firm

Quick Question : I have recently joined an US based startup as a contractor and also parallely working full-time in an Indian IT firm.

  1. How can I receive funds
  2. How do i give explanation for these funds while filing taxes?
  3. The CEO is asking for an Invoice from me to which he can pay me; I don't know how to create one and what to put in it.

help me with this.
EDIT : Crediting money in my parents account is not an option. I am fine with paying taxes, ,whatever amount i recieve. I am looking for a proper solution to receive payments as an individual in my account.