Contribution into traditional IRA

When I enter my IRA contributions for my 2020 return for my wife and I, our tax due goes up, not down. We both turned 70 in 2020. We have not taken any IRA distributions, even though we were 70 1/2 in 2020 due to the COVID measure passed that allows us to wait until age 72 to take a minimum distribution. The measure also allows contributions into an IRA to continue past age 70 1/2. What am I misunderstanding? Why does my tax liability go up when I enter our 2020 contributions (made between 1/1/21 and 4/15/21) when entered into Turbotax?