Taxes off of a check can be calculated but it is not an easy procedure. Many details have to be submitted in order to arrive at a perfect figure. Taxation differs from country to country and state to state. After the all the information is provided, the net pay amount is found. Information such as the country, year, gross pay, pay frequency, federal allowances, exemptions and deductions are to be provided. After all the addition and subtraction, final net pay is found out. This can be done by yourself or you can hire a tax attorney for a better hassle free calculation.