AMWAY BUSINESS

Income under head Profits & Gains from Business & Profession, in ITR 3

But if the amount is in small amount, it can be declared under  IFOS,  of ITR 1 or ITR2.

If he has income from some other source also like salary / capital gain etc, show it as Income from Other sources.. 

As such he can file ITR1. while declaring the income u/h. IFOS.

But there is likelihood of inquiry from CPC, for the said income. At that time he may need to clarify about it.