# XV-CZ-03

Source: https://xmlvalid.com/rules/XV-CZ-03

> In the VAT summary, DifferenceTaxableAmount + DifferenceTaxAmount must equal DifferenceTaxInclusiveAmount, in the foreign currency too (ISDOC 6.0.2, A.10).

- Level: error
- Rule sets: ISDOC amounts and identifiers Standard ISDOC 6.0.2
- Context: `/isdoc:Invoice/isdoc:TaxTotal/isdoc:TaxSubTotal`
- Test: `cz:same(cz:dec(isdoc:DifferenceTaxableAmount) + cz:dec(isdoc:DifferenceTaxAmount), cz:dec(isdoc:DifferenceTaxInclusiveAmount)) and (not(isdoc:DifferenceTaxableAmountCurr and isdoc:DifferenceTaxAmountCurr and isdoc:DifferenceTaxInclusiveAmountCurr) or cz:same(cz:dec(isdoc:DifferenceTaxableAmountCurr) + cz:dec(isdoc:DifferenceTaxAmountCurr), cz:dec(isdoc:DifferenceTaxInclusiveAmountCurr)))`

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