TP state is an abbreviation used in TurboTax for "Taxpayer's state"'
The Schedule IL-WIT is a new form for tax years beginning on
or after January 1, 2018.
Schedule IL-WIT, Illinois Income Tax Withheld, allows you to
enter your withholding information in one place and calculate total Illinois
withholding.
https://www2.illinois.gov/rev/forms/incometax/Documents/currentyear/individual/il-1040-schedule-il-w...
