Thanks for the help @SteamTrain!
That is interesting and looks like a faster approach than filing Form 843 by mail, although I'm a bit risk adverse at the moment due to being late in the filing my taxes. Also as you mentioned, it may not allow me to e-file, I may have to test this once I get all my forms filled out.
Now I have to wonder why would Turbotax suggestions never mention this including this page?
https://ttlc.intuit.com/turbotax-support/en-us/help-article/social-security-taxes/get-refund-excess-...
My odd case is sort of in the "single employer" even though I have 2 W2s from the same employer under different unit (with same FED ID, state ID different).
