Field help: (2023) Notional foreign taxes (line 42 of Form KAP) This text refers to the Steuererklärung 2023. You can find the version for the Steuererklärung 2025 at: (2025): Notional foreign taxes (line 42 of Form KAP) Here you enter the notional foreign tax at source according to line 53 of your tax statement.