These rates are replaced by the provisions of the double taxation agreements concluded by Greece with other countries/jurisdictions. Tax Rates Online An online tariff tool created by KPMG that compares corporate tax rates, indirect income taxes and social security within one or more countries. (iii) Earnings that do not occur in this way or are due to the amount of income tax collected for each tax year beginning April 6, 1952 or under the agreement. (i) residing in the United Kingdom or on a British territory to which this Convention is extended in accordance with Article XVII or ARTICLE XVI. -1) Nationals of one of the contracting parties may not be subject to a tax or related requirement in the territory of the other contracting party that is otherwise, heavier or heavier than the imposition and related requirements to which the nationals of the latter contracting party are or may be subject. Our collection includes many articles and books on double taxation, international taxation and residence issues. As of January 1, 2016, income tax returns must be filed electronically until June 30 of the year following the end of the fiscal year. The fiscal year for individuals is the calendar year.