EMERON.IO / GLOBAL GOV-TECH / EST. 2013
ACADEMY TRUST
REFERENCE ARCHITECTURE · NOT A REAL CUSTOMER · FOR EVALUATION

Federal tax authority on GovStack — a working reference architecture.

A fictional federal tax authority in the fictional Republic of Astoria. Population 35 million. Three tax heads: VAT, corporate, personal income. Twelve regional offices. Multi-channel filing with mobile, web, agent, and bulk-file interfaces. Three years of synthetic data populated to demonstrate analytics, audit selection, and arrears management at scale.

SCENARIOFederal tax authority
POPULATION35M (fictional)
PLATFORMGovStack
STATUSDemonstration environment, live
3
Tax heads modelled
12
Regional office tenants
4
Filing channels live
3yr
Synthetic transaction history
§ 01 / THE FICTIONAL SCENARIO

What "Astoria" looks like.

Astoria is a fictional unitary republic with characteristics drawn from a composite of GCC and East African tax jurisdictions. The authority has 1,800 staff. Population is roughly 35 million, of which 4 million are registered taxpayers. The authority collects approximately 18% of GDP. The legacy system is a 1990s mainframe with no public-facing portal; taxpayer interaction is by paper or branch visit. The brief: bring the authority onto a modern platform without disrupting collection during transition.

  1. 01

    VAT

    Standard rate, zero-rated, exempt. Monthly returns. Input tax credit. Refunds. 240,000 active VAT taxpayers in the demonstration data.

  2. 02

    Corporate income tax

    Resident and non-resident regimes. Annual return with quarterly provisional payments. Transfer pricing module. 38,000 active corporate taxpayers.

  3. 03

    Personal income tax

    PAYE through employers plus self-assessment for non-employment income. 3.5 million payroll-only taxpayers, 180,000 self-assessment.

  4. 04

    Multi-channel filing

    Mobile app (USSD fallback), web portal, agent channel (tax practitioners), and bulk-file API for large taxpayers.

  5. 05

    Audit and enforcement

    Risk-based audit selection. Arrears register. Liens. Cross-tax matching (a VAT discrepancy triggers a corporate-tax review on the same entity).

§ 02 / WHAT IS CONFIGURED

Module catalogue against the brief.

T-01
Taxpayer master
Unified record across all tax heads. Single TIN. Linked subsidiary structures.
T-02
Registration
VAT registration, deregistration, group registration. PIT for self-assessed taxpayers. Corporate registration triggered from companies registry feed.
T-03
Return filing
Per-tax-head return forms. Validation rules engine. E-signature. Submission across all four channels.
T-04
Assessment
Self-assessment, additional assessment, jeopardy assessment. Objection and appeal workflow.
T-05
Payment
Real-time gateway integration. Mobile money. Bank transfer with reference matching. Payment plan workflow.
T-06
Refunds
Refund verification workflow. Three-tier approval matrix. Refund hold for cross-tax liabilities.
T-07
Audit case
Desk audit, field audit, investigation. Working papers. Findings linked to assessments.
T-08
Arrears & enforcement
Demand notices. Liens. Garnishee orders. Public defaulter register.
T-09
Risk profiling
Per-taxpayer risk score. Drives audit selection. Configurable risk model with drift detection.
T-10
Information exchange
Inbound from third parties (banks, customs, land registry). Outbound under tax treaties.
T-11
Taxpayer portal
CitizenOS surface. Account statement, filing history, payment, document upload, objection submission.
T-12
Analytics & reporting
Revenue tracking. Compliance gap. Sector analysis. Anti-money-laundering hooks. Audit yield.
§ 03 / DEMONSTRATION PROTOCOL

How to evaluate this RA.

Scenario walkthrough
A 90-minute live session against the demonstration environment. We take the role of taxpayer, agent, auditor, and administrator in sequence. Your team observes and questions.
Hands-on access
After the walkthrough, your evaluation team can be granted read-only or read-write access to the demonstration tenancy for 30 days. Reproducible scenarios provided.
Configuration review
Your architecture team can inspect the underlying configuration — schemas, workflows, rules — to verify the "no-custom-code" claim. We do not gate access to the configuration.
Performance under load
The demonstration tenancy is sized for the Astoria scenario. A load test against your projected volumes can be arranged on a separate environment.
Adaptation to your jurisdiction
From the demonstration, we can scope an actual implementation against your tax code, your channels, your integration ecosystem. Typical scoping engagement: four weeks.
DISCLOSURE

The Republic of Astoria is fictional. The 4 million taxpayers, 240,000 VAT registrations, and three years of transaction history are synthetic data generated for demonstration purposes. The platform behaviour, configuration, schemas, and workflows are real and identical to what a production deployment would receive.

Book the tax authority walkthrough.

The session is delivered by an Emeron principal engineer plus a domain advisor with twenty years of tax-administration experience. Onsite or remote. No charge to qualified evaluation teams.

Book the walkthrough90 minutes, live environment→ Other case studiesProduction + RA demos→ Platform: GovStackThe platform behind this RA→