08/31/2026
Another important development in the ongoing Kwong litigation over COVID-era interest relief.
The U.S. Chamber of Commerce has filed an amicus brief in Wepplo v. Commissioner supporting the position that IRC § 7508A requires the COVID disaster suspension period to be excluded when calculating underpayment interest even when the underlying tax liability arose before the COVID suspension period began.
That is significant for taxpayers with older IRS assessments. The Chamber argues that § 7508A’s interest provision operates independently of the provision postponing tax filing and payment deadlines—meaning the IRS should not continue charging interest during the statutory COVID suspension period merely because the tax debt itself predates COVID.
In other words, the Chamber agrees with the broader principle underlying Kwong: COVID-period interest relief is not necessarily limited to liabilities arising during the COVID period.
The Tax Court is now considering this issue directly in Wepplo, and we’ll be watching closely.
Read the U.S. Chamber’s amicus brief: