"Apply for checking code to check input tax information of preceding period(Only open for business entities to apply for by themselves. Available to apply for during the first 20 days of every even month.)"
"Entry and Correction of Filing Data", "Inquiry into Status of Business Entity Filing Record" and "Inquiry into Exchange Rate on Each Filing Period" will link to Website of The e-Filing and Tax Payment Service of the Ministry of Finance (R.O.C).