The first appeal deadline is 20 business days (or 30 business days if the assessment refers to transfer pricing). In case the taxpayer disagrees with the first-level decision, it has 15 business days to file the corresponding tax appeal (or 30 business days if the assessment refers to transfer pricing).
It could take seven to eight years. Tax claim: nine months; tax appeal: approximately four years; judicial procedure (two instances): approximately three years.