Carbon Capture, Utilization, and Storage Tax Credit Amendments Act of 2021 This bill extends the carbon oxide sequestration tax credit through 2030. It also permits taxpayers to elect to receive a payment in lieu of the tax credits for carbon oxide sequestration and qualifying advanced coal projects. The bill also makes other modifications to certain carbon sequestration credits, including (1) an allowance of carbon sequestration credits against the base erosion minimum tax, (2) modifications to sequestration requirements for certain qualifying advanced coal project credit equipment, and (3) increasing the sequestration credit value for direct air capture projects.