If I am understanding you correctly, you reported a 2020 contribution that gave you an increased refund because it was not taxing you based on the information you gave to the system, but actually you had contributed to a taxable instrument. Then you converted altogether to a Roth. If that is correct, given that you've converted it before the April 15th deadline (possible to change to June 15th deadline) to a Roth - and if you in fact did receive a "benefit" to your refund, you should amend your return given that you previously reported it to the IRS as a contribution but then converted to a taxable instrument (income not excluded). Again, if this is the case, the IRS will merely take it, plus interest and penalties out of your 2021 refund, if any refund is due to you at that point.
