Adedeji was confirmed following a majority decision by senators after he was screened during a plenary session in Abuja.
While speaking before his confirmation, Adedeji promised to improve the data mining capacity of the FIRS to make appropriate tax decisions.
He attributed revenue leakages to a lack of data on the finances of local and foreign firms operating in Nigeria.
“We will improve our data mining capacity. We will develop the data upon which will we make decisions on taxes.” Adedeji said.