Suppose TDS is already deducted on salary drawn and tax is already paid. Now, recently got some additional income, but that was before March 31. But was unable to pay tax for that. To calculate what amount of tax to pay now, should we consider the (taxable income that was used for TDS)+additional income? Also, since the last date for tax elapsed, how should the penalty be calculated? 1% of which amount? And to show the additional income, is the bank statement xerox copy sufficient?