Best online research i can find so far and this might only apply to Pennsylvania.
https://www.uc.pa.gov/faq/claimant/Pages/1099G-FAQs.aspx
short version is there so much UC fraud, identity theft and mistakes by unemployment office. IRS doesn't want me to turn it in.
I'm so glad this was generated by Pennsylvania's new improved UC system. old one was somehow worse.
