I have to file multiple taxe return and i need to know if I can exclude the ones that have a very low income

You are supposed to file one tax return per year and include all of your income on it. If you exclude some of your W-2 forms, the IRS will contact you to correct it later. 

federal 1040 there is no option to exclude small amounts of income.  states are different  and most have filing thresholds depending on income , marital status and other factors. go to those state's website and look at the non-resident tax return filing instructions for who must file.