After you file

Hello There, Thank you. Yes , I do see the entries from line 16 through 23 expect for line 19 which I mentioned already. Yes, I do see an amount in line 23 for SE Tax. Then I don't understand how the SE Tax is preventing this credit for me? Please elaborate

 

Also, the SE tax per schedule 1, form 8959 ( medicare tax) and 8960 (from investments) shows it is also including medicare tax. Why the SE tax include the medicare tax that I need to pay though?