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How do I obtain an IL-PIN and do I need it to file my IL-1040 return?
The IL-PIN is a unique number we assign after you have filed an Illinois income tax return. The IL-PIN is required to activate a MyTax Illinois account or to use certain MyTax Illinois applications, such as filing an IL-1040 return, make a MyTax Illinois payment, and request a Letter ID. (First-time filers with Illinois are not issued an IL-PIN and may not file their IL-1040 return through MyTax Illinois. Please see the first-time filers webpage for more information.)
If you have been assigned an IL-PIN, you may access it by using our IL-PIN Inquiry in MyTax Illinois or calling us at 800 732-8866. Before you make an inquiry, have your Illinois Driver's License/State ID or prior-year adjusted gross income readily available.
If you file a joint return and use tax preparation software to file your return, each taxpayer must have an IL-PIN or a valid Illinois Driver's License/ID Card on file with the Illinois Secretary of State.
If your filing status or name has changed from last year, you can still use tax preparation software or MyTax Illinois to file online. Visit the MyTax Illinois Help Guide for more information.
Note: If you are looking for information about your Illinois property’s "parcel number" or "permanent index number" (PIN), see our Property Tax Number Information webpage.