English to Spanish Bus/Financial Law: Taxation & Customs Income Tax

Hi! I do not really know if it means "deducciones en los ingresos" o "reducciones en los ingresos". I would like to think that including this items at your Income Tax Declaration, you should pay less taxes... And I do not know if it is "en los", "para los", " de los"

Retirement and social security income. . . . . . . . . . . Ingresos por Seguridad Social y Jubilación
Illinois income tax refund. . . . . . . . . . . . . . . . . . . . . Devolución del Impuesto sobre la Renta en Illinois
Total subtractions . . . . . . . . . . . . . . . . . . . . . . . . . . Total de "deducciones/reducciones" ??
Illinois base income . . . . . . . . . . . . . . . . . . . . . . . . Ingresos base en Illinois


An another word for "ingresos"? "Base imponible" is exactly the same!? Because it does not say "taxable income"...

Thanks in advance!!!