With the decision of the Constitutional Court dated 22/02/2023 and numbered 2022/155 E., 2023/38 K., the first sentence of the Article 187 related to the woman taking her husband’s surname upon marriage of Turkish Civil Code Numbered 4721 has been annulled with the majority of votes due to being found unconstitutional. The decision will enter into force 9 months following its publishing in the Official Gazette.
You can access the full text of the decision through https://www.resmigazete.gov.tr/eskiler/2023/04/20230428-9.pdf.