The 2020 distribution must be reported on your 2020 tax return on form 8606 Part III where the taxable amount is calculated. If you took out no more than your contributions, the result will be that no part of the distribution is taxable or subject to penalty; only taxable distributions from a Roth IRA are potentially subject to an early-distribution penalty. If you qualify, you also have the option to treat the distribution as a Coronavirus-Related Distribution which gives you 3 years from the date of the distribution to repay the amount to your Roth IRA even though such treatment might not be needed to avoid tax and penalty.
Whatever amount of taxes withheld for 2020 was in excess of your 2020 tax liability will be your 2020 tax refund.
