ARCA Updates the WSMTXCA Manual to Version 0.25.10 in Argentina

The Customs and Tax Collection Agency (ARCA) has published version 0.25.10 of the Developer Manual for the Electronic Invoicing Web Service with item-level details (WSMTXCA). This update introduces adjustments to the validations related to the recipient’s VAT status, within the framework of General Resolution 5616/2024.

The new documentation is available in ARCA’s External Certification section, where version 0.25.10 is identified as the current version for the WSMTXCA service.

These changes are relevant for companies that use this service to authorize electronic invoices through CAE or report invoices under the CAEA regime.

What Changes Does WSMTXCA Manual Version 0.25.10 Introduce?

WSMTXCA Manual version 0.25.10 introduces modifications to the handling of specific validation codes. The main adjustment concerns the condicionIVAReceptor field, which indicates the recipient’s VAT status.

The most relevant changes include:

• Codes 190 and 290: The validation handling for the recipient’s VAT status has been modified. Missing mandatory information results in rejection, while values not supported by the service are handled through specific new codes.
• Codes 191 and 291: Invalid combinations of the recipient’s VAT status and the document type are now treated as rejections rather than warnings.
• Codes 198 and 298: These are introduced as new rejection codes for VAT statuses not supported by the service.
• Codes 398 and 498: These are added as warning codes for VAT statuses not supported when submitting information under the CAEA regime.

These adjustments aim to strengthen the validation of tax information submitted through the service and require companies to review how their systems process ARCA responses.

Which Companies Are Affected by This Update?

The changes primarily affect companies that use the WSMTXCA Web Service to issue electronic invoices with item-level details.

In particular, the following organizations should pay attention:

• Companies requesting invoice authorization through CAE.
• Companies reporting invoices under the CAEA regime.
• Businesses integrating their management systems with the WSMTXCA service.
• Organizations processing information related to their customers’ VAT status.

It is important to note that WSMTXCA is the service used to issue Type A and Type B electronic invoices with item-level details. You can learn more about its scope in ARCA’s official Electronic Invoicing Web Services documentation.

What Should Companies Review in Their Invoicing Systems?

In light of the changes included in WSMTXCA Manual version 0.25.10, companies should verify that their systems are prepared to correctly handle the new validations.

The following aspects should be reviewed:

1. Recipient’s VAT status: Ensure that the condicionIVAReceptor field is correctly included in authorization requests.
2. Permitted values: Verify that the reported VAT status matches one of the values available through the consultarCondicionesIVAReceptor
3. Document compatibility: Confirm that the recipient’s VAT status is compatible with the type of document being issued.
4. Error handling: Update processing rules to account for the new and modified rejection and warning codes.
5. Integration testing: Perform tests in the certification environment to identify potential inconsistencies before implementing the adjustments in production.

For detailed technical specifications, companies can access the official WSMTXCA Developer Manual.

When Will the New Validations Take Effect?

The publication of version 0.25.10 updates the technical documentation available for the WSMTXCA service. However, it is important to distinguish between the publication of the manual and the implementation of the validations in the production environment.

At this time, the documentation reviewed does not confirm a specific production implementation date for these changes. Therefore, companies are advised to monitor ARCA’s official announcements and regularly review its External Certification and Documentation section.

How Can Companies Prepare for Changes to Electronic Invoicing in Argentina?

Updates to electronic invoicing services require companies to keep their systems aligned with current tax regulations.

Reviewing validations, checking submitted information, and performing integration tests are important steps to reduce invoice authorization errors and prevent disruptions to invoicing processes.

In this context, having a localization solution that addresses Argentina’s tax requirements makes it easier to adapt to regulatory changes and helps keep invoicing processes aligned with ARCA’s requirements.

Keep Your Operations in Argentina Aligned with Tax Requirements

At LLB Solutions, we provide localization solutions for Microsoft Dynamics 365 Business Central, designed to help companies manage the tax and operational requirements of countries across Latin America.

If your company operates in Argentina and needs guidance on managing changes related to electronic invoicing, our team can help.

Contact us to learn how our Argentina Localization can support your operations in Microsoft Dynamics 365 Business Central.

info@llbsolutions.com | Argentina Localization