It is concluded that the secret of successful tax service in Dandong, Liaoning Province is simplified form, joint operation of departments and integration of tax declaration. Dandong: The tax rebate bonus will reach the market players. Dandong Taxation will continue to strengthen services and safeguard measures to ensure that the anti-epidemic is not relaxed, the tax refund is not delayed, and the tax refund policy dividend will reach the market players directly. In order to ensure that taxpayers should know everything and enjoy everything, the Taxation Bureau of Dandong City, State Taxation Administration of The People's Republic of China uses tax big data to classify enterprises in advance, find out the base, establish ledgers, accurately locate beneficiary enterprises, and establish a grid service model to ensure that every household does not land.