---
title: MX+ | September 2026 Release
description: "MX+ September 2026 release: fixed-rate IEPS, credit notes, Foreign Trade with Banxico rates, customs declarations, addenda and POS for NetSuite."
---

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[Efficientix](https://www.efficientix.com/en/?hsLang=en) / [Blog](https://www.efficientix.com/en/blog?hsLang=en) / MX+ | September 2026 Release

# MX+ | September 2026 Release

Oct 21, 2026, 1:29:35 PM · Natalia Mejía

09MX+ReleaseSeptember2026

*Monthly MX+ release: Efficientix's tax and operations localization for Oracle NetSuite in Mexico.*

During September, MX+ expanded its tax and foreign trade capabilities, added tools for credit notes and addenda, and strengthened the stability of stamping and point-of-sale flows.

## Basic

### Invoicing and tax compliance

- Added support for IEPS excise tax calculated as a fixed amount per unit, with the amounts shown on the invoices.
- Tax data autofill now respects values edited by the user and completes fields when appropriate.
- Strengthened the validation of the recipient's tax data and the stamp availability check.
- Enabled manually linking a credit note to one or more stamped invoices.
- Improved stamping of operations authorized outside the usual 72-hour window.

## Pro

### Foreign Trade, Customs Declarations and Addenda

- Foreign Trade expanded value calculation across currencies and added the Banxico reference exchange rate, along with improvements to generate documents with more consistent customs information.
- Customs declarations (pedimentos) improved the capture and validation of customs data on receipts and the management of the related balances.
- The donations complement was reactivated on sales invoices.
- Addenda were updated, including the fix for the Walmart receipt number and confirmed adjustments for Soriana.

## Premium

### POS and Kiosk

- If a sale coming from the point of sale lacks the required tax information, the system can regenerate it to continue the stamping process.

*The availability of each improvement depends on the modules enabled in your account.*

## Want to update or learn more?

If you are already a customer, [open a support ticket](https://www.efficientix.com/en/support-netsuite?hsLang=en) to schedule your update. If you do not use MX+ yet, [book a demo](https://www.efficientix.com/en/contact?hsLang=en) or learn about the [MX+ localization for NetSuite](https://www.efficientix.com/en/netsuite-mexico-localization?hsLang=en).

See all releases in [MX+ Release Notes](https://www.efficientix.com/en/blog/tag/mx-releases?hsLang=en).

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