Each year, the rental income earned by real persons are declared to the respective tax office with the Annual Income Declaration until the end of March (for 2024 income, April 2, 2025). The types of income that are within the scope of immoveable assets except the rental income, are stated in the Income Tax Law Number 70. In order to declare the rent income, the lump sum expense method and actual expense method are implemented. Taxpayers who choose the lump-sum expense method can deduct the lump-sum expense of 15% of the amount remaining after deducting the exemption amount from the rental income in return for actual expenses. Those who lease the rights cannot apply the lump sum expense method. In the below table, the related details are provided for rental income from residential and commercial properties.

The conditions related to the taxpayers who are eligible to submit their Withholding and Premium Service Declarations electronically are regulated in the Tax Procedure Law General Communiqué numbered 340 and Tax Procedure Law Circular numbered 15.

Based on these conditions, in summary, taxpayers will be able to obtain the password required for the transactions related to the Withholding and Premium Service Declaration from the relevant Tax Offices if they meet the following conditions:

"The Communiqué on Keeping Commercial Books Not Related to the Accounting of the Enterprise in Electronic Environment" covering the regulations regarding the creation, maintenance, storage, and submission of commercial books in electronic environment was published in the Official Gazette dated February 14, 2025 and numbered 32813.

With the introduced regulation, it has been made mandatory to keep the share ledger, board of directors' resolution book, managers' resolution book, and general assembly meeting and negotiation book in electronic environment.

The General Communiqué on Tax Procedure Law (Serial No: 582) was published in the Official Gazette dated February 15, 2025 and numbered 32814.

In the Communiqué, the following arrangements have been made regarding inflation adjustment.