This ties into a number 1-866-464-9748 which is on a letter supposedly from Publishers Clearing House. This is the "IRS" phone number and when you call them they tell you that they will have a Scott Manning call you right away!
Don't be fooled..This is a scam as they ask you to send money for taxes.  If this were legitimate, you would be paying the taxes directly to the IRS in the state in which you reside, when you file your income taxes.