- Issue output VAT e-invoices according to Circular 78. - Check the validity of each input and output invoice. - Specify the arising economic transactions on the tax software of the Company. - Quarterly VAT and PIT declaration, Prepare annual financial statements according to state regulations. - Arrange, supplement and store accounting vouchers according to regulations. - Coordinate with KTT to work with tax authorities and agencies when problems arise, coordinate with HR Department to monitor social insurance. - Support internal array when required. - Other tasks as assigned by KTT and superiors.