I filled my IRA distribution but 1040 line 4 is empty

[rjs]

Form 1040 lines 4a and 4b are for IRA distributions, not contributions. If you made a deductible IRA contribution the deduction should be on Schedule 1 line 19.

[tdhaayushverma]

my bad, its IRA distributions, and I did the backdoor IRA 

https://thefinancebuff.com/how-to-report-backdoor-roth-in-turbotax.html

I was expecting  on

line 4a -- $12000 (me and my wife)

and on

line 4b--  $0.0 

[dmertz]

If you did the Roth conversion in 2020, it will be reportable and appear on line 4 of your 2020 tax return, not on your 2019 tax return.