Can I use simple divorce forms with the following background: 3 years married in USA petitioner is resident of IL of more than 90 days and US citizen

Hello, Jaime. I'm not 100% sure what you mean by "simple divorce forms." If you're talking about the forms they have in the clerk's office, then yes, you should be able to use those. If you're talking about generic forms from a 3rd-party site or source, then it would depend on the form and what is included in the form they have provided. The best bet, outside of hiring a lawyer to prepare the necessary documents for you, is to check with the clerk's office in your local county and see what forms they offer and if there are any specific facts or details that are required above and beyond others. I hope this helps.