For my IL tax refund, turbo tax says I need to enter Spein, but I have no clue what that is and searching in turbo tax was not helpful.

[BillM223]

Can you give us the context in which this word is used? 

[drosket]

It shows up during "Fix Errors".   Below is what the page displays:

Check This Entry

Schedule IL-WIT Income Tax Withheld: Spein must be entered.

Spein:   <enter value>

[drosket]

All, this refers to the "Federal ID" of the payer on your W-2.  If you received unemployment benefits it will be the "IDES Federal ID" on your 1099-G form.

[Critter-3]

Could that be the "SPouse's"  EIN on their W-2 form in the state section box 15 ?