COVID allows you to spread the money over 3 years using form 8915E. That would account for the larger difference. See Form 8915-E: Qualified 2020 Disaster Retirement Plan Distributions and Repayments,
The IRS updated form 5329’s instructions to make it clear that COVID related exceptions cannot use 5329 and should use the new 8915-E.
In addition, you have those 3 years to repay the money. So you may be able to repay some of it in the next 2 years and not have to pay the full tax on your distribution.
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