SINIEF Adjustment No. 29/2026 postpones to 12/14/2026 the ban on NF-e referencing NFC-e: what tax and IT teams need to adjust now

One more extension to the electronic tax documents calendar

The National Council for Tax Policy (CONFAZ) published, in the Federal Official Gazette on September 14, 2026, SINIEF Adjustment No. 29/2026, once again postponing the start of the prohibition on issuing outbound NF-e that references an NFC-e. The new effective start date is now December 14, 2026.

(cite index="22-1,22-2">The deadline for the prohibition on issuing outbound Electronic Invoices (NF-e) that reference a Consumer Electronic Invoice (NFC-e) to take effect was postponed to December 14, 2026, according to SINIEF Adjustment No. 29/2026, published in the DOU this Monday (14), approved by CONFAZ and the Special Secretariat of the Brazilian Federal Revenue Service during the Council's 202nd Ordinary Meeting, held on September 4, in Maceió (AL).

A history of successive postponements

This is not the first time the rule's date has changed. (cite index="25-6,25-7">The original forecast was January 5, 2026. Then it moved to May 4, October 5, and now, December 14, 2026. For those closely following the timeline, it's worth noting the origin of the rule: (cite index="22-4">SINIEF Adjustment No. 32/2025 established that an outbound NF-e could not be issued referencing an NFC-e.

The legal text remains the same as in the original edition: (cite index="21-10">The issuance of an outbound NF-e that references an NFC-e is prohibited, except for the issuance of a complementary NF-e. In other words, the exception for the complementary invoice remains intact — (cite index="22-5">the exception for issuing a complementary NF-e remains set forth in SINIEF Adjustment No. 32/2025.

What exactly changes with SINIEF Adjustment No. 29/2026

Technically, the adjustment does not change the substance of the rule, only the timeline. (cite index="22-4">SINIEF Adjustment No. 29/2026 took effect on its publication date and only changed the start date for the prohibition's effects. This means that, until December 14, 2026, it remains possible to operate as it does today: issuing an outbound NF-e (model 55) referencing one or more previously issued NFC-e (model 65) — a common practice, for example, in consolidating fuel station receipts for fleets or in retail operation adjustments that migrate documents.

For tax and IT teams, the practical takeaway is: (cite index="37-2">the processes involved in this issuance now have December 14, 2026, as the reference date for the start of the prohibition set forth in the rule. This applies both to internal business rules and to the configuration of NF-e and NFC-e issuing systems.

Why this matters for those operating with high NFC-e volume

Retail companies, fuel stations, pharmacies, and chains that consolidate sales via NFC-e and occasionally issue NF-e referencing these documents gain a new adaptation window. (cite index="37-6">For retail businesses, which frequently issue NFC-e and later need to issue an outbound NF-e to cover interstate operations or returns, the extension provides more time to reorganize workflows without immediate risk of rejection.

It's worth reinforcing that the scenario involving references to obsolete documents (ECF Fiscal Receipt, Consumer Sales Invoice Model 2) is a separate rule, already in effect since January 2026, and was not changed by this adjustment. The point addressed now specifically concerns the reference between two current electronic documents — NF-e and NFC-e — not legacy analog documents.

Practical recommendations for the coming weeks

• Update internal tax process documentation with the new date of 12/14/2026, preventing sales or billing teams from acting based on the previous deadline (10/5/2026).
• Review, together with the IT team or ERP provider, whether the complementary NF-e issuance routine is correctly configured, since this is the only exception that remains valid once the prohibition takes effect.
• Monitor for possible further changes: the history of four postponements in just over a year shows that the topic remains sensitive and may be revisited by CONFAZ.
• Take advantage of the extended deadline to map all business workflows that currently depend on this reference between NF-e and NFC-e, especially in sales consolidation and return operations.

This content is informational and does not replace guidance from your accounting or tax team, who should assess the specific impact of the rule on your company's operations. To closely track these changes with an ERP prepared for the Brazilian tax calendar, talk to Edoo.