Retirement tax questions

In my 2020 form 8606, line 1 is $6000, line 2 is 0.

 

"When it asked for the past years non-deductible contributions", I didn't have that question when I input the 1099-R for $12000. I was only asked about the IRA basis.

So what shall I put for the non-deductible contributions for the past years? I just started saving in 2019, made $12000 after-tax traditional IRA contribution in 2019 ($6000 withdrawal in 2020), shall I just write down as $6000?

 

Maybe I should start the section all over again?