Any taxpayer or owner, having the right of redemption, may anticipate the payment of the unpaid delinquent taxes for the tax year one thousand nine hundred and thirty-eight and previous years at any time on or before August first, one thousand nine hundred and thirty-nine, by paying the entire amount of such unpaid delinquent taxes, and interest due on the one thousand nine hundred and thirty-five, one thousand nine hundred and thirty-six, one thousand nine hundred and thirty-seven and one thousand nine hundred and thirty-eight taxes, and receive the benefit of this act.