Salaried individuals who will be filing the income tax by the end of the ongoing financial year, also need to submit a tax declaration form. Often, new employees get confused regarding what needs to be declared in the tax declaration form. Income Tax Declaration via Form 12BB is a statement of claims that an employee gives for deduction of tax to his or her employer to claim tax benefits or rebates on investments and expenses. Employees need to provide this declaration to their employers in a timely fashion because based on the declaration, the employer calculates the tax deducted at source (TDS) on the employee’s salary.