How do I make online tax payment sitting at home/office in india?

1. Open you'r net-banking account.
2. Go to website www.incometaxindia.gov.in , click on ‘pay taxes 
on-line’. 
3. Fill in the required challan online. Help is available on screen 
as FAQ, downloads etc. 
4. Make tax payment through net-banking account online. 
5. A challan counterfoil will be available instantaneously on the 
screen with CIN (challan identification number). The Challan 
Identification Number (CIN) on this counterfoil should be 
quoted in Return of Income. 
6. Print the counterfoil and also save it in the computer if 
required. 
7. Check if your payment has reached the Income Tax 
Department at 
https://tin.tin.nsdl.com/oltas/servlet/QueryTaxpayer .