ARCA updates MTXCA Manual v0.25.5 with new validations

Key changes in ARCA MTXCA 0.25.5 update and its fiscal impact

The MTXCA ARCA 0.25.5 Update published by the Tax Collection and Customs Control Agency introduces new validations that directly impact electronic invoicing processes in Argentina.

You can consult the official authority here:
ARCA – Tax Collection and Customs Control Agency

This version affects authorization rules in CAE, CAEA, and VAT adjustments, incorporating new rejection causes and observations related to the recipient’s CUIT status.

Main changes in the update

This new version introduces important adjustments in electronic invoice validation:

New rejections based on CUIT status

New rejection reasons are added when the recipient’s CUIT presents inconsistencies:

• CUIT deactivated or invalidated
• CUIT classified as a non-reliable taxpayer in Social Security
• CUIT classified as fraudulent

These rejections directly impact the authorization of invoices in ARCA-regulated electronic invoicing processes.

New invoice observations

New observations are also introduced that do not block the operation but highlight tax inconsistencies:

• Deceased recipients without probate succession
• CUIT inactive or invalid
• CUIT with Social Security restrictions
• Fraudulent CUIT

These observations are part of tax compliance monitoring.

Credit note validation change

One of the most relevant adjustments is the change in the validation logic for amounts.

Now, in credit notes, the total sum of associated documents (excluding delivery notes) is validated against the total amount of the main document.

Impact on CAE, CAEA, and VAT adjustments

These changes apply across different system processes:

• CAE invoice authorization
• CAEA processes
• VAT adjustments

The update aims to unify validation criteria within the electronic tax ecosystem

Business impact

Although this update does not modify technical system structures, it directly impacts electronic invoice approval.

Companies may face:

• Higher probability of rejections due to CUIT status
• Increase in fiscal observations
• Stronger control over credit notes

Official links and documentation

• ARCA institutional portal
• ARCA technical and regulatory documentation

Technical recommendation

Companies must review their integrations, as these new validations may affect the automatic approval of electronic invoices.

Proper adaptation helps avoid operational rejections and ensures regulatory compliance.

Is your company ready for these changes?

At LLB Solutions, we help you adapt your Microsoft Dynamics 365 Business Central electronic invoicing integrations to comply with ARCA’s new validations without disrupting your operations.

Contact us today and ensure continuity in your tax processes.

info@llbsolutions.com | Argentina Localization