By Vottax at 13 de Outubro de 2026

Monday, 8 a.m. Finance reports that invoices are being rejected. The tax team says the calculation changed. IT says nobody requested an adjustment. Sales wants to know why the biggest client's order didn't go out.

Most of the time, the cause is simple: an outdated master record.

With Brazil's tax reform, this kind of problem is likely to become more frequent in companies running SAP. During the transition, the old model and the new one (IBS and CBS) will coexist in the same system. Any data or rule inconsistency shows up on the invoice.

In the daily routine of tax and IT teams, four points tend to create the most risk.

Inconsistent master data. Outdated tax classifications and NCM codes are the most common cause of rejection. The error starts in the data and only appears at issuance.

Patched tax rules. Rushed adjustments with no documentation create dependency on specific people and make any change harder.

Unprepared integrations. CRM, WMS and e-commerce must send and receive the new tax fields. If one fails, the problem spreads across the chain.

Last-minute testing. Validating at go-live is the highest-risk scenario. There is no time to fix issues, and the team is under pressure.

Five questions to assess your readiness

If your company can't confidently answer two or more of them, a deeper analysis is worth it.

  1. How many materials in your master data have outdated tax classification?

  2. Who in the company can explain how SAP will handle IBS and CBS during the transition?

  3. Are your integrations ready for new tax fields?

  4. Is there a testing schedule with dates, owners and a fallback plan?

  5. How quickly could you deliver credit traceability in an audit?

What changes for those who act early

The best-prepared companies don't wait for every detail of the legislation to be defined. They run a diagnostic, prioritize the highest-risk points and test in stages. The cutover becomes a planned routine, not a crisis.

How Vottax can help

Vottax brings tax consulting and SAP specialists together in a single team. People who understand the legislation work directly with those who configure the system, which reduces rework and speeds up compliance.

Want to know where your SAP stands? Talk to our specialists for a tax readiness assessment.

Comments (0)
The comments are the sole responsibility of their authors and do not represent the opinion of this site.

No comment. Be the first to comment!