It depends. If you only had one employer, then you do not need to do anything. If you had two or more employers, then you may want to if you had excess Social Security Tax withheld. You can determine this by adding up the W2 or W2c's with the latest numbers in box 4. If the amount is greater than $8,537.40, then you can file a 1040X to claim a refund for the excess withheld.
Social Security Tax Deferred