Yes, individuals can e-file their state taxes in Illinois. The Illinois Department of Revenue offers a convenient online filing system that allows taxpayers to submit their returns electronically. E-filing is a popular choice because it is generally faster and can help reduce errors. Taxpayers can use various tax preparation software programs that are approved by the Illinois Department of Revenue for e-filing. Additionally, the state provides options for both residents and non-residents, ensuring that each taxpayer can find a suitable method for their particular situation. For comprehensive information about e-filing, including the necessary steps, available software options, and any associated fees, it is beneficial to refer to the current web page for the Illinois Department of Revenue. This source will provide the most up-to-date information and guidelines on e-filing state taxes.