File ITR 2 or 2A (prefer)
There will be no refund since this lottery income is taxable at straight 30% and no deduction or exemption is allowed therefrom. If Tax on salary has been deducted properly then there shall be no refund
115BB. Where the total income of an assessee includes any income by way of winnings from any lottery or crossword puzzle or race including horse race (not being income from the activity of owning and maintaining race horses) or card game and other game of any sort or from gambling or betting of any form or nature whatsoever, the income-tax payable shall be the aggregate of—
(i) the amount of income-tax calculated on income by way of winnings from such lottery or crossword puzzle or race including horse race or card game and other game of any sort or from gambling or betting of any form or nature whatsoever, at the rate of thirty per cent; and
(ii) the amount of income-tax with which the assessee would have been chargeable had his total income been reduced by the amount of income referred to in clause (i).