Any corporation which is liable to the payment of taxes or required to deduct taxes and pay over the same under the provision of any law imposing: (a) A tax on the capital stock or a franchise tax on the taxable value of the capital stock of corporations, (b) a tax on gross receipts derived from business done wholly within this State by public utility corporations, (c) a tax on indebtedness issued, assumed, or on which interest is paid by corporations, (d) a tax on shares of stock of banks and title insurance and trust companies, or (e) a tax on gross premiums derived from insurance business in this Commonwealth, shall have authority to pay such taxes or any portion thereof into the State Treasury in advance of the due date thereof, and upon such advance payment to be entitled to receive a discount of four per centum (4%), per annum, on the amount of tax so paid, which discount shall be calculated from the date of the advance payment of the tax to the date such taxes actually become due, as ascertained by reference to the date when such taxes are actually settled and the time allowed by law for payment after settlement.