The correct process is to contact your plan administrator and request a "Corrective Distribution". This should be done prior to the filing deadline for 2021 in order to avoid additional penalties. This will be reported on a 1099-R with the distribution being reported in 2021 and any earnings reported in 2022.
If you have a traditional 401k set up the deferrals and contributions are pre-tax dollars, so when you receive the distribution it is taxable.
If your 401k is set up as a Roth, the deferrals and contributions are after-tax and therefore the distribution is not taxed.
See 401k corrections for more information on correcting your excess contributions.
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