Which ITR form should be used for this scenario?

Arunachalam (Proprietor) (186 Points)

24 July 2018  
Dear all:

One of my friends is driving his JCB for a company on a contract basis and he is paid each month by that company. The contract is for 5 years. He does not have any other source of income. Can you please advise which form he should use for filing ITR?