Get your taxes done using TurboTax

FYI a 2019 IRA contribution had to be made on or before 7/15/2020

so Turbotax is counting the entire $16K as a 2020 contribution. max less of $6K, $7K if over 50 or compensation

you had until 4/15/2021 to withdraw the excess.  now you need to report (Turbotax should do this)  excess contributions on form 5329 and pay the penalty. thus the basis is the max allowed for one year.