Prerequisites
1. You should hold a PAN card.
2. You should have a user id and password to login to
https://incometaxindiaefiling.gov.in/
3. Check your registration status in the below link
https://incometaxindiaefiling.gov.in/portal/register.do?screen=registerPage1
4. If you do not have a the login credentials then create your login id online. Click “New User Registration” https://incometaxindiaefiling.gov.in/portal/login.do

Procedure to upload the ITR1.xml
1. Log on to https://incometaxindiaefiling.gov.in/portal/login.do. User id will be your PAN number.
2. Click on “Know Jurisdiction” to get your income tax ward details.

3. Go to “Download” tab and select AY2011-12.
4. Select appropriate type of Return Form (ITR-1) and download the Xls template in your desktop.

5. Update the xls file with necessary data from your Form 16. After updating all information, click calculate tax, validate and generate XML file.

6. Go to “Submit Return” -->“Select Assessment Year”--> “AY 11-12” and load the XML file in the site.

7. Once loaded, take the print out of the ITR-V page.
8. Post the ITR-V page to "Income Tax Department – CPC, Post Bag No - 1, Electronic City Post Office, Bengaluru - 560100, Karnataka", only by normal post.
9. Check the status of ITR-V at “ITR-V Receipt Status”. You will get an acknowledgment mail to your email id once IT Dept received your ITR-V form.
10. And finally you will get a mail with subject “Intimation U/S 143(1) for PAN ASMxxxxx7L AY:20111-12” with respect to the return of income filed by you for the Assessment Year 2011-12. You will get this mail between 6 to 8 months after e filling. This document gives you the details about AGGREGATE INCOME TAX LIABILITY, TOTAL TAX CREDIT, TOTAL INCOME TAX REFUND, NET AMOUNT REFUNDABLE and NET AMOUNT PAYABLE.
PS: This is not an expert suggestion. I just wanted to share the procedure I followed to e-file my Tax this year. Following these instructions are subjected to user's risk.
This article will get archived by 31st July 2011.