Working out of state

[Intrusion]

Hi, I live in Illinois and I'm employed by a company that resides in Wisconsin. They told me they aren't able to withhold state taxes and that I'd need to save 10% of my income to pay them myself. Is this correct and if so how do I actually go about paying? Do I just file like I normally would at the beggining of the year?

Thanks.

[Critter-3]

First you should have filled in a W-220 so no WI taxes are withheld :  

https://www.revenue.wi.gov/TaxForms2017through2019/w-220.pdf

Reciprocal state rules :  https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/states-reciprocal-agreements...

Next you need to send in  quarterly IL estimated payments :    https://www.officialpayments.com/pay-illinois-taxes.jsp

[Intrusion]

WI taxes aren't currently being withheld but I never filled out a W-220. Will I need to get in contact with the accounting department and get that filled out? 

Thanks.

[Critter-3]

If they are not withholding WI taxes then you have no reason to fill in that form.  Just make the IL estimated payments.