Yes, as stated by Champ tagteam, you will have to amend your federal tax returns only. You should wait until you receive your W-2C and compare your gross wages, Social Security withholding, and Medicare withholding. Social Security withholding should be 6.2% of your Social Security gross wages and Medicare withholding should be 1.45% of your Medicare gross wages.
To amend your return, please follow the steps on the page How do I amend my federal tax return?
@stefanz
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