How to register an online cash register for an individual entrepreneur on the simplified tax system engaged in mobile trade

On July 30, 2026, the Federal Tax Service released a detailed procedural guide for individual entrepreneurs (IE) who operate under the Simplified Tax System (USN) and utilize mobile trading stalls equipped with online cash registers. The guide outlines the sequential steps required to obtain official registration of the cash register device within the FNS electronic ecosystem. First, the entrepreneur must possess a certified online cash register that complies with technical standards and has an active integration key. Next, the IE logs into the personal account on the FNS portal, navigates to the “Electronic Catalog of Cash Registers,” selects the appropriate model, and initiates the registration process by uploading the device’s serial number and firmware version. The system then generates a unique registration number, which must be entered into the cash register’s software settings. The guide also explains how to link the registered device to the entrepreneur’s tax profile, ensuring that all sales data are automatically transmitted to the tax authority. Critical deadlines are highlighted: registration must be completed at least 30 days before commencing mobile trade, and any modifications to device parameters must be reported within five business days. Failure to comply may result in administrative penalties. Finally, the guide provides troubleshooting tips for common connectivity issues and directs users to a dedicated help desk for assistance.

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