official loan in cash but in income tax department return shows

Abovemention, I gave some perso 4 lacs RS. four lacs cash. he gave me cheque after 1 year only capital, I had not asking for any interest because I don't want to take interest with my friend. can I borrow white money as a loan 4 lacs RS. 1st day I gave him half & next days half.
please kindly help me.