@user17692885947
Some folks have apparently seen that form be required, if the $$ in box 6 of the W-2 , are not exactly 1.45% of box 5.
One thing that has worked for some, is to drop the cents in the box 6 value. There may be some strange rounding issue that's messing it up, and being a bit below 1.45% isn't usually an issue.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*