Caution:

The amounts posted with CRN 280 do not represent a refundable credit. The CRN amounts are a false credit used to mask balances owed towards the deferred portion of the employee’s share of social security taxes for 2020 until the earlier of the payment towards the deferred tax being made or the due date for payment coming due (i.e., December 31, 2021). This methodology is used to ensure penalty and interest calculations associated with the 2020 deferred payment amounts are accurately computed.

For more information on the Deferral of the Employee’s Share of Social Security Taxes for 2020, see IRM 21.7.2.8.2, Notice 2020-65 and Notice 2021-11 — Deferred Payment of Employee’s Share of Social Security Taxes for 2020.