Regarding taxation of income from business of e-recharge, e-bill payment

Assessee is engaged in the business of E- bill payment of telecom users, E-Recharge of telecom user etc. Due to this Bank Deposits are heavy but the actual income of assessee is just the commission from telecom service provider. The deposits in his bank consist of bill payment of users which is again debited to his bank account when he makes payment to telecom service provider. Ultimately, he is just the middle man between user and telecom service provider for which he is getting commission which is his actual income. I would like to ask for opinion on how to present or report this income in income tax return.