Global chemical multinational migrates to SAP S/4HANA and replaces Thomson Reuters with TTAX’s comprehensive tax suite

A multinational company managing a complex chemical operation with manufacturing plants that rely on a flawless logistical flow. In this environment, precision and speed in both outbound document issuance and the inbound processing of controlled chemical inputs are critical to preventing production line downtime and ensuring just-in-time deliveries.

To consolidate and modernize its corporate operations, the company launched one of the most strategic initiatives in its IT history: the migration of its legacy ERP, SAP ECC, to the next-generation SAP S/4HANA platform.

The Challenge

During the preparations for designing the S/4HANA environment, the tax and technology teams encountered a major bottleneck: the legacy market tax solution they previously used (developed by Thomson Reuters) would require a complex, expensive, and time-consuming adaptation project to run on the new ERP architecture.

Retaining the previous system would mean accumulating heavy customizations and dealing with fragmented messaging and inbound processes. The company needed an alternative that guaranteed:

Secure and Immediate Replacement: A seamless vendor transition right at the S/4HANA go-live window.
End-to-End Inbound Automation: Full automation of the goods-inbound flow, eliminating manual processes and errors in raw material bookkeeping.
Immediate Regulatory Readiness: Structuring the new SAP environment for the upcoming Tax Reform and, specifically, for the requirements of Ajuste SINIEF 49/2025 (which defines the new rules for debit and credit notes under the Dual VAT framework).

Faced with a challenging timeline, TTAX was chosen as the strategic partner to unify and revolutionize the multinational’s tax governance.

The Solution

TTAX implemented a 360° tax architecture in a native environment (ABAP/Fiori), eliminating standalone systems and seamlessly integrating all tax routines required by the client’s new ERP. The solution covered the following verticals:

1. TaxOrion Fiscal Solution and Outbound Messaging

At the SAP S/4HANA Go-Live, TTAX completely replaced the legacy tax system with the TaxOrion Fiscal Solution combined with its Messaging Engine. Operating transparently within the familiar SAP Fiori interface, TaxOrion took over tax determination for the chemical operation, while the Messaging Engine secured the outbound flow, authorizing NF-e and NFS-e with maximum speed and stability.

2. Inbound Automation with Easy4 (DF-e Inbound)

The previous fragmented process for supplier document entry was replaced by the Easy4 for SAP Inbound module. Easy4 now automatically captures XML files from SEFAZ, executing robotic recipient acknowledgment and cross-checking invoice data directly against Purchase Orders within SAP. This ensures rapid, error-free pre-booking before the truck even arrives at the factory.

3. Tax Reform Suite and Event Monitor Implementation (SINIEF 49/2025)

With billing and inbound processes consolidated, the project advanced to its most innovative phase of regulatory intelligence. The company is currently implementing TTAX’s Event Monitor, integrating it into the Tax Reform Suite.

This workstream natively prepares the client’s SAP S/4HANA environment for Ajuste SINIEF 49/2025, automating and monitoring the issuance and reception of the new debit and credit notes essential for IBS and CBS financial adjustments and settlements under the new Dual VAT guidelines.

The Result

The coordinated ERP migration combined with the technological transition to TTAX solutions delivered high-impact results for the multinational:

Transition with Zero Operational Impact: The replacement of Thomson Reuters with TTAX solutions was executed in full compliance with the S/4HANA timeline, keeping industrial shipments active and billing operations running at maximum capacity.
Inbound Efficiency and Automation: Easy4 eliminated manual bottlenecks in raw material inbound tax processing, reducing cargo wait times at the factory yard and eliminating the risk of hidden tax liabilities.
Pioneering Compliance with SINIEF 49/2025: With the Event Monitor project and the Tax Reform Suite underway, the company positions itself ahead of the market—fully prepared for the reform’s new financial and currency adjustment notes well ahead of the legal deadline.
Drastic Cost Reduction (TCO): Consolidating tax rules, messaging, and inbound processing under the TTAX ecosystem eliminated high licensing fees from multiple vendors and significantly reduced IT customization costs.