12366 is a 24-hour hotline. The working hours of the manual agents of the 12366 tax service hotline are from 9 am to 12 am and from 1 pm to 5 pm every Monday to Friday. The automatic voice service provides 24-hour service. The "12366 tax service hotline" is the State Administration of Taxation's need to strengthen and improve tax services. It has a unified call center code, namely: 12366-1 for the National Taxation Bureau and 12366-2 for the Local Taxation Bureau. It combines manual and automatic voice to provide multi-functional and high-quality voice services around the clock.