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Changes to e-invoicing rules, Revenue Administration (GİB) announcements, the Official Gazette and marketplace news — with the impact on sellers, sourced and dated.
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Since August 1, 2026, the previous price on a discount label is the lowest price of the last 10 days, and the seller's right to reply before a consumer complaint is published lasts 48 hours. Content creators who receive compensation must label their posts as "advertisement" or "promotion."
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Tax Procedure Law (VUK) General Communiqué No. 595, published in the Official Gazette dated September 5, 2026, extended the obligation to report to the Turkish Revenue Administration (GİB) to social network and hosting providers. The activity of people who sell regularly on social media and classified ad sites is becoming more visible to GİB.
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Version 1.43 of the UBL-TR Code Lists, published by the Turkish Revenue Administration (GİB) on July 27, 2026, has been in force since September 14, 2026. For a marketplace seller, the real task is confirming that your integrator or invoicing software has been updated to the new rules.
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Under a draft e-commerce regulation reported in the press in August 2026, large marketplaces would be able to transfer a seller's product, sales and review data to a competing marketplace free of charge at the seller's request. As of October 3, 2026, the draft is not in force.
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According to Trendyol's developer announcements, the legacy order service shuts down on October 15, 2026, the origin field for country of origin becomes mandatory on October 23, and October 8 is the deadline for complying with the new return rejection reasons. Sellers using an integration should get confirmation of compliance from their software provider.
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Simplified-method and business-account taxpayers in Türkiye can issue invoices not exceeding 3,000 TL including taxes on paper in 2026; from January 1, 2027, this threshold ends and all invoices will be e-archive invoices.
