The filling of budgets at all levels is crucial for the implementation of national and regional programs of socio-economic development. Tax and nontax revenues are exactly the fillers. A key source of Changes in the composition of governments lead to transformations of the taxation system. Tax rates are changed most often and it reflects the interests of those financial and industrial groups that control the government. In addition, from time to time there are requests from the public for introduction or cancellation of certain taxes, changes in preferential taxation regimes, control of accrual correctness, completeness and timeliness of payment by taxes, levies or payments. Key words: monitoring of tax and non-tax (financial) flows, tax and non-tax (financial) flows, tax deduction stream, timing of inspections, optimization of work of the state fiscal service.