Have you filed your 2020 return yet? You should not file until you get all your W2s for 2020. They have until Jan 31 to send them to you. And there is no hurry to file. The IRS won't open filing and accepting returns until Feb 12 this year. So there's plenty of time. Just wait.
If you did file without all your income you have a problem. So wait and see if the IRS accepts or rejects your return on Feb 12 or later. You may have to amend your return.
