Measuring the tax gap resulting from the application of the direct deduction method and its reflection on the financial objective of the tax: Applied research in the General Directorate of education in Diyala. (2022). Journal of Accounting and Financial Studies ( JAFS ), 17(61), 136-151. https://jpgiafs.uobaghdad.edu.iq/index.php/JAFS/article/view/1117