The Brazilian Federal Revenue Service (RFB) has confirmed an important change to the EFD-Reinf (Digital Tax Bookkeeping of Withholdings and Other Tax Information) submission process, which will now require the use of more modern security protocols. As of August 20, 2025, the EFD-Reinf production environment will no longer accept connections via TLS 1.0 or 1.1, making the use of TLS 1.2 or higher mandatory.
Since the beginning of July, accountants and companies have begun reporting failures in the submission of data to the Reinf Web Service, caused precisely by the use of older versions of the TLS protocol.
Even with the error in data submission, the Federal Revenue Service maintained the August 20 deadline. The restricted production environment already operates exclusively with TLS 1.2 or higher, allowing taxpayers to test their systems before the official switchover.
For companies still using systems or software that have not been updated, the risk is one of interruption in EFD-Reinf submissions, compliance failures and, consequently, exposure to fines, enforcement actions and tax risks.
This technical change, though seemingly limited in scope, has direct implications for organizations’ day-to-day operations, particularly for those that still maintain manual processes or depend on outdated systems that are not frequently updated.
At MCS Markup, we are prepared to transform this scenario of technical urgency into an opportunity for fiscal and technological advancement. Our EFD-Reinf solution goes beyond simple adaptation to the new protocol: we deliver automation, precision and tax intelligence to the process.
See how MCS Markup can support your company:
complete update of security protocols, ensuring compatibility with the official Federal Revenue Service environments, automation of the EFD-Reinf generation, validation and submission process, drastically reducing the likelihood of human errors, prior validation in the restricted environment, allowing for adjustments before official submission, integration with management systems (ERP), centralizing information and accelerating fiscal closing, and active monitoring and management reports, with insights for decision-making and greater tax control.
Our team combines accounting expertise, tax knowledge and technical capabilities to offer intelligent, tailored solutions focused on delivering real results for the company.
The mandatory requirement for TLS 1.2 is just one more reflection of the Federal Revenue Service’s broader movement toward digitalization and information security. Companies that anticipate these changes not only avoid problems: they gain a competitive advantage.
By partnering with MCS Markup, your company ensures compliance with regulations and transforms mandatory processes into strategic tools for business growth.
Contact our specialists and find out how we can support your company in complying with EFD-Reinf requirements, with security, agility and tax intelligence.
