It is a nationally certified qualification test app provided by the Korea Tax Association, and you can use application registration, test ticket inquiry, mobile qualification, etc.[Certification category and grade]- State-certified computerized tax accounting: computerized taxation level 1, 2 / computerized accounting level 1, 2- National Certified Tax Accounting: Level 1, Level 2, Level 3 in Tax Accounting- Korea Tax Service Certified Corporate Accounting: Corporate Accounting Level 1, 2, 3