Symptom
Message FF848 'Entry of tax for &1 &2 is not possible because of tax base 0' in Post Outgoing Payment/Post Incoming Payment when posting Down payment.
"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."
Environment
- SAP S/4HANA Cloud Public Edition
- Post Outgoing Payment - F1612
- Post Incoming Payment - F1345
Reproducing the Issue
- Attempt to post down payment in app Post Outgoing Payment/ Post Incoming Payment
- Message FF848 'Entry of tax for &1 &2 is not possible because of tax base 0' does not allow to post the document
Cause
The G/L account assigned for Input Tax Clearing is configured with the Tax Category "Input Tax Account," which is unsuitable for a Tax Clearing account.
Resolution
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Tax Category '>' - 'Output tax account' should be set only in output tax G/L accounts.
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Tax Category '<' - 'Input tax account' should be set only in input tax G/L accounts.
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Tax Categories: *, -, + etc. could be set in clearing input/output tax G/L accounts.
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For example, down payment clearing account for output tax should not have Tax Category: '>' - 'Output tax account' which is strictly reserved for tax accounts and should not be set in clearing accounts:
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- It is important to distinguish tax accounts from clearing tax accounts

Keywords
tax base determination, ff848, down payments, input tax clearing, tax category, sap s/4hana cloud, vat, tax clearing account, g/l account configuration, tax processing, financial operations, ff, 848 , KBA , FI-GL-GL-F-2CL , Value Added Tax (VAT) (Public Cloud) , Problem
SAP Knowledge Base Article - Public