Learn the process of planning revenues and expenses by consulting the laws that set goals, priorities, targets and break down anticipated revenues and expenses.
See here the Pluriannual Plan that establishes in a regionalized way the guidelines, objectives and goals of the state public administration for the public expenses and revenues for a period of 4 years.
See here the Budget Guidelines Law that defines the goals and priorities of the State Government for a period of one year.
See here the Annual Budget Law where the discrimination of the revenue and expenditure of the State is carried out. See how much was budgeted for each government program.