On 9 June 2026 the Lithuanian tax authority announced an update to the manual titled Individual activities performed under a specific mark, which is used to describe self‑employment activities carried out under a recognized professional designation. The revised edition introduces clarified definitions of permissible business scopes, updates the list of approved professional marks, and incorporates recent legislative changes affecting the taxation of such activities. It also provides detailed guidance on record‑keeping obligations, mandatory registration procedures, and the calculation of taxable income derived from these marked activities. Additionally, the manual includes a set of illustrative examples that demonstrate how different types of services should be classified and reported for tax purposes. The notice emphasizes that all individuals engaged in marked activities must comply with the new requirements starting from the first day of the following fiscal year, and it instructs tax inspectors to perform audits to verify adherence. By publishing the updated manual, the authority seeks to reduce uncertainty among entrepreneurs, improve tax compliance, and ensure that the tax system accurately reflects the evolving nature of modern professions.