Efficiency of tax proofing for income tax and value added tax

The diploma thesis points out the problem of higher than necesary compliance costs of taxation on income tax and value added tax in the proofing process and it provides an analysis of the causes of this indirect administrative costs. The thesis is focused on difficult proofing process in tax proceedure and provides most frequently required proper evidence by tax authories. Methods of analysis and synthesis from is used in the diploma thesis. These are the findings from literature, questionnaire and archive survey. The outcome of the thesis is that by consistent archiving of all proper evidence used on income tax, can significantly improve the proofing proces used on value added tax and vice versa. The recommendation is to create an separate archive where the tax entity keeps the all primary documents and proper evidence, which would also have the effect on reduction the compliance costs incurred in the tax proceeding