IRIS 7846 - Calculated income tax deviates more than 1% in comparison to previous perios!
For this employee income tax for the current Pay Slip deviates by more than 1% in comparison with the previous Pay Slip.

Solution
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For this employee correct payroll preparation or the data that are influencing income tax and launch the calculation again.
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For all employees we can the Cod table for Document type remove the checker for Warn in difference from Previous Period over !%. with removal of the checker this error will no longer appear in this document type.