Intimation u/s 143(1)

Hello!

My friend have received an intimation from the IT Dept with following queries:

1. Charging interest u/s 234B and 234C since the tax liability was above Rs.10,000.

2.They have not considered the TDS deducted on the above income.

3.Since he is a salaried employee he was deducted TDS and so he did not pay advance tax.

My Query:

1.Should I file a revised/rectification to IT?  (or)

2. Is it sufficient if I give reply online in the outstanding demand section?

Thanks in Advance!