TurboTax is calculating the amount Social security tax in box 4 based on wages reported in box 3. The amount of Social Security tax should be 6.2% of the box 4 wage amount. If your employer elected under the Cares Act to defer the Employee share of the Social Security taxes, then a W2C could be issued. I would recommend reviewing your Box 3 and Box 4 amounts to determine if box 4 is 6.2% of box 3. If its, then you can proceed through the warning.
