If it's truly just a different position with the same employer, the employer is required to limit the Social Security withholding to $8735.40 for 2020. If they withhold too much, the employer must make the correction, return the amount of the excess withholding to you and correct your W-2. Getting credit on your tax return for having excess Social Security withholding only applies when the over-withholding is the result of having different employers.
