The amount in Box 12 with Code C is for taxable cost of group-term life insurance over $50,000.
To decide if you should amend, use this interactive assistant from the IRS: Should I file an amended return? The impact on your return would be nominal to report an additional $200, but it could change your income depending on the rest of the return.
If you do decide to amend, see:
How do I amend my 2020 TurboTax Online return?
Do I need to amend my state if I amend my federal?
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