Turkey has extended the deadlines to submit Value-Added Tax return and to pay the accrued taxes to 28 April 2020, for the period of February/2020 from 24 April 2020, for the period of March/2020 (including the period of January-February-March/2020 for the taxpayers with taxation period of three months) from 27 April 2020.
Please see this link for full text of the Tax Procedural Law Circular number 129 and dated 21 April 2020 of the Turkish Revenue Administration (Only available in Turkish