After I entered the income to the1099 NEC line in Personal Income, the line showed nothing. I tried it again and again. It still showed zero. Why? Thank you.

@lorraine_otero ,  assuming that you are using  windows download Home & Business  ( only because I am not familiar  with the screens of the on-line versions );

(a)  Under  Personal Income tab,  select  " I will choose what I work on "

(b) Then from the list of  income types  shown, go down till you find  1099-NEC and select this.

(c) This will take you through set of questions/answers  to help fill out  the Schedule-C -- this is where you report  Non-Employee Compensation -- 1099-NEC.

(d) Note that the Schedule-C income also attracts  Sel-Employment tax  ( Schedule-SE ) . This equivalent to FICA taxes  but at the full 15.3%.

Does this help ?  Is there more I can do for you ?