As a new employer, do I need to register and file with IDES? Your newly-created business (employing unit) must register with IDES within 30 days of start-up.It will assist you in filling out the form. To avoid any delays in getting unemployed benefits, you should file the application during the first week of unemployment. To receive unemployment insurance benefits, you need to file a claim with the unemployment insurance program in the state where you worked. The best way to apply is online at the IDES website. You may also call (800) 244-5631. This blog series outlines unemployment insurance requirements in different states, including Illinois UI employer liability employee eligibility. Understanding these rules is crucial for corporate officers and business owners who may need to navigate the complexities of filing a UI claim. Do this before you begin an application online as the system will time out after an hour of nonuse, according to IDES.