Small- and medium-sized enterprises are essential to the economies of nearly all countries, as they directly influence the GDP and tax revenue. In 2019, the European Federation of Accountants and Auditors for SMEs surveyed SME account users, revealing that tax authorities were the most common recipients of the company’s accounts, accounting for 61.40% of cases. This study, from a macroeconomic perspective, aims to uncover evidence of the impact of mandatory audits of Egyptian SMEs on their income tax compliance. It also seeks to explore the Egyptian SME tax environment to fill the knowledge gap by exploring perceptions of SMEs’ tax performances and their levels of tax. This study provides evidence that the taxpayers’ tax compliance behavior is an essential and decisive factor in the compliance of Egyptian SMEs with income tax. The results show that SME management is less persuaded by the potential benefits of mandatory audits on tax compliance than auditors and academics. Also, the study found experimental evidence confirming that the mandatory auditing of SMEs positively impacts their compliance with income tax. Additionally, this study developed a tax compliance scale (the RTRP scale) that effectively suits the nature and characteristics of SMEs, enabling the quantitative measurement of their compliance levels with income tax, as well as comparisons between SMEs.