OFFICIAL LETTER 1475/CTBNI-TTHT ABOUT DEPRECIATION OF FIXED ASSETS TO TAX EXPENSE

OFFICIAL LETTER 5450/CTBDU-TTHT ABOUT CHANGE OF INVENTORY CALCULATION METHOD

OFFICIAL LETTER 5226/CTBDU-TTHT ABOUT TAX POLICY

OFFICIAL LETTER 9279/CTHN-TTHT ABOUT DEPRECIATION OF FIXED ASSETS

OFFICIAL LETTER 169/CTBNI-TTHT ON TAX POLICY FOR JOBLESS ALLOWANCE

OFFICIAL LETTER 1338/CTBDU-TTHT ABOUT TAX POLICY

OFFICIAL LETTER 199/CTBNI -TTHT ON CIT POLICY FOR TRIAL PRODUCTION COSTS

OFFICIAL LETTER 1498/CTBDU-TTHT ON TAX POLICY

OFFICIAL LETTER 798 /CTBDU-TTHT ABOUT THE COST OF GOODS DESTROYED DUE TO DAMAGE IN THE TRANSPORTATION

OFFICIAL LETTER 22455/CTBDU-TTHT ABOUT SELLING COSTS IN FOREIGN CURRENCY