In order to test the significance of hypothesis one, the findings showed in table 2 revealed that value added tax, petroleum profit tax, company income tax and education tax were the variables selected on the basis of highest partial correlation to meet the entry probability requirement of less or equal to 0.05 (≤ 0.05). The result depicts the relationship between the dependent variable (total federally collected revenue) and each independent variables (value added tax, petroleum profit tax company income tax and education tax) that meet the entry probability requirement of less or equal to 0.05 (P≤0.05). The result further showed that the four variables, value added tax, petroleum profit tax company income tax and education tax had a strong positive correlation of 0.971 with the dependent variable, total federal collected revenue. This means that the four variables together had a strong relationship with the total federal collected revenue in Nigeria. The relationship between total federal collected revenue and the independent variables vale added tax petroleum profit tax and company income tax with the effect of education tax partial out was also stated as 0.957, this indicating a gradual decline in the relationship by 0.014 (0.971-0.957), which means despite the decline in the relationship as a result of partialling out the effect of education tax there exist still a strong relationship between total federal collected revenue in Nigeria and the independent variables value added tax, petroleum profit tax and company income tax.