Can i revise my return after receiving income tax refund

If you are eligible for filing your revised return you can do it just as you file a normal return. But under the column asking for the section in which the return is filed select revised return. There is no need to show the refund you have received in Income Tax return. Just provide the income details and pay the additional taxes along with interest. 

But Sir I have received refund already...and if I pay the tax as per revise return then actually I am paying less tax.(For eg. Refund amount 2000 and revised tax payable is 2500 then actually i am paying only 500 as tax

I dont think this is right way but you can revise your return by paying tax computed by you, Your return will be processed with demand, after that check your outstanding demand and pay the demand (this amount may be higher than refund received by you).

you may follow this example:

Original tax return tax liability : Rs 10000

Tax Credit: Rs 12000

Refund claimed and credited: Rs 2000

Tax liability as per revised tax return: Rs 14500/- (assuming including the interest payable)

Tax payable being shown in return Rs 2500 (Rs 14500 less total tax credit (12000))

Additional tax you should pay before filing the revised tax return: Rs 4500 (Rs 14500 less actual tax credit left (Rs 12000-2000)

So, the revised return will show a refund of Rs 2000 but during the assessment the system will adjust it against the refund already granted. 

Not paying in advance will only increase the tax payable later as interest for late payment will continue to accumulate.

according to the income tax rules , this is generally not possible?can you please provide me the exact situation.

could you please refer to the exact rule/section?