This is a situation not supported by the TurboTax Software, the suggestion is "The taxpayer should manually calculate the excess Social Security tax withheld. Add the amounts on the 'agent reporting' W-2s that appear in Box 4, Social Security tax withheld less the wage base. Enter the excess amount on Schedule 3, near line 10" This will need to be done manually and mailed in.
Please see this TurboTax FAQ, for more information, Are there any personal (individual) tax situations...
