Solution : https://service.sap.com/sap/support/notes/710591 (SAP Service marketplace login required)
Key words :
earned income status formula number additional exemption code supplemental code additional percentage, exemption amount additional exemption amount additional exemptions personal exemptions dependent exemptions, earned income credit, function group ehu2, federal tax authority, user exit badi, certification check box, exempt indicator field, certification box, exempt indicator
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