According to the announcement made by the Social Security Institution (SSI) on 18 June 2025, the deadline for the payment of premium debts pertaining to the April 2025 period has been set as June 25, 2025, in cases where such debts are paid through the offsetting of VAT refund receivables.

This adjustment was introduced following a notification by the Revenue Administration of the Ministry of Treasury and Finance, indicating that some taxpayers may encounter delays in the offsetting process of their VAT refund receivables against premium debts for the April 2025 period by the initial deadline of June 20, 2025.

By the circular of the Revenue Administration dated April 29, 2025;

The filing deadline for Corporate Tax Returns regarding the 2024 fiscal period, which were originally due by the end of April 30, 2025, as well as the deadline for payment of taxes accrued based on these returns, has been extended until the end of Monday, May 5, 2025.

The submission deadline for the Annual Income Tax Declarations for the 2024 calendar year, which was originally due by the end of April 2, 2025, has been extended, along with the payment deadlines for the taxes assessed based on these returns.

According to the circular issued by the Revenue Administration on March 27, 2025:

Employees who are obliged to submit annual income tax returns for 2024 tax year wages or other non-wage income (including employees working in R&D centers and technology development zones) can submit their declarations between March 1 - April 2, 2025 using the online declaration system of the Revenue Administration.

Employees can have annual income tax return obligations for their wage income under certain conditions.