VAT Return Agent
Calculate, verify and submit the VAT return via ELSTER.
Aggregates posting data by VAT indicator, creates the EC sales list, checks consistency with the general ledger and prepares the ELSTER submission.
Score Dashboard
What This Agent Does
The VAT return is a monthly obligation for most companies. The calculation itself is rule-based - but the data aggregation from different posting areas, the consistency check and the plausibility review take time. The EC sales list for intra-community supplies is an additional obligation, often completed under time pressure.
The Decision Layer breaks the VAT return into eight decision steps. Aggregation of posting data by VAT indicator runs automatically. The plausibility check compares with the prior month and flags deviations. Consistency between VAT charge and posting totals is checked. Only for significant deviations above 10% is the case escalated to the clerk.
The result: the VAT return is ready by the third working day instead of the tenth. Transcription errors in indicator assignment are eliminated. And the ELSTER submission confirmation is archived GoBD-compliantly.
Micro-Decision Table
Aggregate VAT indicators How are posting data assigned to VAT return lines? Rules Engine Auditor
Mapping table from tax codes to return lines
Decision Record
Challengeable: Yes - rule application verifiable. Objection possible for incorrect data or wrong rule version.
Challengeable by: Auditor
Calculate indicators What are taxable revenues, input tax and intra-community acquisitions? Rules Engine Auditor
Arithmetic aggregation
Decision Record
Challengeable: Yes - rule application verifiable. Objection possible for incorrect data or wrong rule version.
Challengeable by: Auditor
Create EC sales list Which intra-community supplies are reported? Rules Engine Auditor
Format specification of the Federal Central Tax Office (BZSt)
Decision Record
Challengeable: Yes - rule application verifiable. Objection possible for incorrect data or wrong rule version.
Challengeable by: Auditor
Plausibility check Do the indicators deviate significantly from the prior month? AI Agent Auditor
Historical comparison - AI recognises unusual fluctuations
Decision Record
Challengeable: Yes - fully documented, reviewable by humans, objection via formal process.
Challengeable by: Auditor
Consistency check Does the VAT charge match the posting totals? Rules Engine Auditor
Numerical comparison GL vs. VAT calculation
Decision Record
Challengeable: Yes - rule application verifiable. Objection possible for incorrect data or wrong rule version.
Challengeable by: Auditor
Prepare ELSTER submission Is the return created in ELSTER format? Rules Engine
Format standard per ELSTER specification
Decision Record
Challengeable: Yes - rule application verifiable. Objection possible for incorrect data or wrong rule version.
Approval for deviation Must a clerk review the deviation? Human Auditor
Review for deviation above 10% vs. prior month
Decision Record
Challengeable: Yes - via manager, works council, or formal objection process.
Challengeable by: Auditor
Archive submission confirmation Is the ELSTER confirmation archived GoBD-compliantly? Rules Engine
GoBD archiving obligation
Decision Record
Challengeable: Yes - rule application verifiable. Objection possible for incorrect data or wrong rule version.
Decision Record and Right to Challenge
Every decision this agent makes or prepares is documented in a complete decision record. Affected parties (employees, suppliers, auditors) can review, understand, and challenge every individual decision.
Prerequisites
- ERP system with VAT indicator logic (SAP, DATEV or equivalent)
- ELSTER interface or certificate
- Access to VAT ID validation (EU VIES) for EC sales list
- Defined plausibility thresholds for deviation detection
Governance Notes
Direct tax return per Paragraph 18 UStG. The VAT return must reach the tax office by the 10th of the following month (with permanent extension by the 10th of the second following month). Late or incorrect returns lead to late-filing surcharges per Paragraph 152 AO.
The EC sales list is mandatory per Paragraph 18a UStG for intra-community supplies. Consistency between return and bookkeeping is a standard audit point during tax audits per AO Paragraph 193 ff.
§203 StGB-relevant data is encrypted end-to-end and never passed to AI models in plain text.
Process Documentation Contribution
Infrastructure Contribution
The VAT Return Agent builds the tax aggregation engine reused by the GoBD Compliance Agent and Tax Audit Preparation Agent. The ELSTER interface framework is used for all electronic tax returns. The plausibility engine forms the foundation for anomaly detection in tax data.
Builds Decision Logging and Audit Trail used by the Decision Layer for traceability and challengeability of every decision.
Related Agents
GoBD Compliance Agent
Continuously monitor GoBD compliance - archiving, procedural documentation, retention deadlines.
Withholding Tax Agent
Check withholding tax obligation, apply DTAs, calculate withholding and file with BZSt.
Tax Audit Preparation Agent
Prepare for tax audit - compile data, identify risk areas, answer auditor questions.
Frequently Asked Questions
Can the agent also create the annual VAT return?
The annual return builds on the monthly returns but requires additional checks and corrections. The agent prepares the data basis. The final annual return is reviewed and approved by the tax advisor.
How are different VAT rates in different EU countries handled?
For intra-community acquisitions and services, the agent applies the reverse charge mechanism per Paragraph 13b UStG. The correct assignment to return lines is automatic per the tax code of the posting.
What happens when the consistency check finds a difference between GL and VAT calculation?
The agent identifies the difference, assigns it where possible to a specific posting area and escalates it to the clerk. Frequent causes like unassigned tax codes are automatically recognised and suggested.
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