Taxpayer received f1099-B after he e-filed his 2021 return. However, f1099-B has only one transaction and has "Transactions for which basis is not reported to the IRS and for which short or long-term determination is unknown (to broker)". If TP had received this 1099-B before filing, the transaction would have been reported as short-term capital gain with a basis of zero.

TP reported the transaction as part of the wages when he e-filed. As wages and ST capital gain have the same rate and TP is below the NIIT threshold, should TP take no action now? Or, Does TP need to file an amended return?

Please comment and advise. Thanks for your time.