# F-LIB266

Source: https://xmlvalid.com/rules/F-LIB266

> Invalid TransactionCurrencyTaxAmount. Must be negative if TaxTotal/TaxAmount is negative, and must be be positive if TaxTotal/TaxAmount is positive

- Level: error
- Rule sets: OIOUBL 2.1 Invoice rules (Denmark) 1.17.2, OIOUBL 2.1 Credit Note rules (Denmark) 1.17.2, OIOUBL 2.1 Reminder rules (Denmark) 1.17.2
- Test: `cbc:TransactionCurrencyTaxAmount and (number(cbc:TransactionCurrencyTaxAmount) != 0) and (cac:TaxCategory/cbc:ID = 'StandardRated') and (((number(cbc:TransactionCurrencyTaxAmount) < 0) and (number(../cbc:TaxAmount) > 0)) or ((number(cbc:TransactionCurrencyTaxAmount) > 0) and (number(../cbc:TaxAmount) < 0)))`

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