A service tax number is a unique identification number assigned to businesses that provide taxable services in India. It is mandatory for businesses with an annual turnover of more than Rs. 9 lakhs to obtain a service tax number. The service tax number is used to track and collect service tax from businesses.
There are several ways to check the validity of a service tax number. One way is to visit the official website of the Central Board of Excise and Customs (CBEC) and enter the service tax number in the search box. Another way is to send an SMS to 567678 with the service tax number. The CBEC will then send a reply SMS confirming the validity of the service tax number.