Republican attorneys general in 20 states have joined in opposition to the Biden administration’s proposal requiring financial institutions to give the Internal Revenue Service information on any bank accounts with a balance of more than $600 — to help pay for Washington Democrats’ proposed $3.5 trillion spending bill.

The group wrote a letter dated Friday to President Biden and Treasury Secretary Janet Yellen arguing the Treasury Department proposal to improve tax collecting “stands in direct opposition to privacy that Americans are entitled to and deserve.”

The agency projects the policy change, which tentatively requires at least $600 in annual transaction for IRS access, will generate $460 billion in tax revenue over 10 years.