Catch up 2020 HSA contributions made in 2021

Just got off the phone with my HSA administrator asking where to enter catch up HSA contribution for 2020. He informed me that I should enter the amount I made for 2019 tax year since I paid that amount in calendar year 2020. This makes no sense since that amount entered in 2020 turbo tax immediately changes my 2020 refund. I think he is wrong.

 

My question is: Should I put my personal HSA contribution amount in the 2020 turbo tax box MADE in calendar year 2021 for the TAX year 2020? Yes I know about the total max allowed with turning 55 in 2020.