Tehsildar has the power to issue the OBC non-creamy layer certificate. As you have not mentioned the state from where you need to apply for Income Certificate, you need to approach the following agency in your state with the Income Certificate Application.

Who all can issue OBC NCL certificate?

It is a certificate issued by central govt to people who are under central obc list and whose income is under 6 lakhs p.a. for the purpose of reservation to educational institutions and jobs.

Who will issue creamy layer certificate?

The Non Creamy Layer Certificate is issued by the Tahsildar of the concerned State Government. Hence, the procedure for obtaining the Non-Creamy Layer Certificate differs from state to state.