I live in Michigan and started a part-time job for a company in Illinois during 2019. Since I have never filed in Illinois before and do not have a Illinois state ID, I have to file a hard copy tax return. My question is about the attachments of W-2's and 1099 forms to the return - do I just attach copies of the W-2 from the Illinois income, or do I need to also attach W-2's and 1099's for all of my income and activities that just relate to Michigan?
Thanks.
