Wrong value for CalculatedAmount Version 14.1.0

[rimmel-ai]

For Austria I tested an invoice with 0,20,10,13 VAT.
The value for "CalculatedAmount" 11.51 is wrong it should be 11.50

                desc.AddApplicableTradeTax(basisAmount: 88.50m,
                                   percent: 13.00m,
                                   typeCode: TaxTypes.VAT,
                                   categoryCode: TaxCategoryCodes.S,
                                   allowanceChargeBasisAmount: 0.00m
                                  );

Result:

 <ram:ApplicableTradeTax>
    <ram:CalculatedAmount>11.51</ram:CalculatedAmount>
    <ram:TypeCode>VAT</ram:TypeCode>
    <ram:BasisAmount>88.50</ram:BasisAmount>
    <ram:CategoryCode>S</ram:CategoryCode>
    <ram:RateApplicablePercent>13.00</ram:RateApplicablePercent>
  </ram:ApplicableTradeTax>

Any idea?

[HenriSHS]

I took a look in the documentation and from my understanding 11.51 is the right CalculatedAmount.

7.1.8 Rounding rule in calculations
The rules that apply to calculate a Factur-X require a rounding calculation at certain stages (e.g. when
multiplying or dividing). The rounding method is that of the nearest value, with the rule for determining the
residual fraction to 0.5 as follows:
• For positive numbers: rounded up. Example: 13.455 rounded up to 2 digits gives 13.46

https://github.com/stephanstapel/ZUGFeRD-csharp/blob/master/documentation/zugferd23en/Documentation/1.%20FACTUR-X%201.0.07%20EN.pdf Page 35

[rimmel-ai]

Thanks.
The problem arises with gross amounts. Customers work with gross prices:
100/1.13=88.50
88.50*1.13=100.01=>VAT 11.51
So we have to solve it in the application.

[GambaJo]

I have the same problem. But why is this value calculated by this library? Should it not be just read out of the XML-file and not calculated? Even if it's wrong?
If I just want to visualize the XML for humans, now this library would deliver not the values out of the XML.

Example:
BasisAmout=221.49 and Percent=7

In the InvoiceDescriptor TaxAmout=15.50

In the XML CalculatedAmout=15.51

At the moment it's not possible to get the original value from the XML (15.51) via the InvoiceDescriptor, so it's not possible to validate, if the values in the XML are correct.

Maybe @stephanstapel can tell us how the concept is.

[stephanstapel]

please update to the latest github version or wait for version 17.0