A new Revenue Administration communiqué makes electronic tax notification compulsory for a broad group that includes corporate taxpayers, individuals taxed on commercial, agricultural or professional income, collective and ordinary limited partnerships, and people or entities completing the first acquisition of registration-required goods on Special Consumption Tax List II. For foreign founders and investors, the practical risk is simple: a notice is legally treated as served at the end of the fifth day after it reaches the electronic account, even if an optional email or SMS alert is missed.
Who must join and by when
An existing covered taxpayer who was not already in the system before the communiqué must join by 30 November 2026—the end of the month following publication. A covered taxpayer established after 11 October must join within 15 days after starting activity. For a first acquisition of a registration-required item on Special Consumption Tax List II, including the relevant new-vehicle transactions, enrolment must be completed before registration. People already enrolled before 1 July 2026 continue with their current credentials and do not reapply.
How activation works
The application can be made through the Digital Tax Office or at the relevant tax office using the appropriate form. Online activation requires email and/or SMS verification. A person without a Digital Tax Office password can use the ‘Register with e-Devlet’ route, obtain credentials and activate the notification service. An in-person filing by a representative requires a notarised power of attorney containing specific authority for electronic-notification procedures.
The five-day legal clock matters
An electronically signed tax document is deemed served at the end of the fifth day after it reaches the electronic notification system. Email and SMS alerts are optional conveniences: failure of an alert does not extend the deadline or invalidate service. Businesses should therefore assign a responsible person, check the electronic account routinely and preserve internal evidence of review rather than relying only on phone notifications.
Exceptions and a practical checklist
The communiqué lists exceptions, including individuals under 18 and qualifying cases involving a disability rate of at least 90%; separate exceptions apply to some public, diplomatic and international bodies in first-registration cases. This article is general information, not individual tax or legal advice. Confirm whether your taxpayer status or vehicle transaction falls within the rule, activate the account on time, verify contact details and ask a licensed Turkish tax adviser or lawyer to calculate any procedural deadline tied to a received notice.