I worked for 2 different legal entities who use the same EIN ("Agent for") to file my W2s. How can I get Turbo Tax to allow reimbursement of excess social security tax?

My employer says "You will claim the refund for any excess taxes withheld through your Federal Income Tax Return Form-1040 (reference Schedule 3).".  But Turbo Tax says I need to request a W2c from my employeer.