NEFT, GRPT services shall be available till 20:00 hours on 29th, 30th and 31st March 2014. On 31st March 2014, Central Government transactions can be done till 11:55 pm through form-based transactions and till 10:00 pm through file-based transactions. You can see procedure for making online income tax payment here and how to make online service tax payment here along with screenshots.
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