2026 transaction guide for Defter-Beyan
IOP guide; It explains the new year confirmation, ledger status and the steps to be taken into consideration when sending records through the integrator.
In the 2026 calendar year guide of the Revenue Administration, it is stated that the welcome screen must be approved before starting the income and expense records of the relevant year. This step also applies to users who submit records via accounting software or integrator.
Taxpayers who continue to use the system do not need to re-apply just because of the new year. On the other hand, in case of situation changes such as transition from operating account to balance sheet basis, the relevant transaction must be completed separately by selecting the correct book year.
This content is not a new application period announcement, but a summary of the guidance for registration checks during the year. Before the transaction, the compatibility of the registry information, book status and taxpayer status should be reviewed.
Automatic translation. If in doubt, review the Turkish text and the official source.