It sounds like two things are going on here. You are correct, if your Social Security is over-withheld due to changing jobs, the amount of additional withholding is returned to you on your 2021 tax return. TurboTax should make this calculation automatically.
However, if any single employer over-withheld then they would need to re-issue a corrected W-2 and refund you the amount they over-withheld. It sounds like all your Social Security withheld is only being reported on one of the W-2s? I could not re-create this error. This may be due to an importing issue. Please ensure that the correct Box 4 amount is being reported from each of your employers. It should be 6.2% of the Box 3 Social Security wages up to a maximum of $8,854.
