Unemployment Income Tax Forgivness

My wife is self employed and received $5800 Federal Unemployment Money. We already filed our tax and she owed $840 to the IRS. We authorized the IRS to withdraw from our Credit Union account to pay the tax. The withdrawal date is April 1, 2021. What can I do to stop this automatic withdrawal since the Covid Relief Bill was just signed into law and the Unemployment Tax Forgivness of $10,200 applies to her, thus reducing her Federal Tax Liability considerably? How do we handle this situation?