SE family leave credit 2020 asks if want to use 2019 net income I pick No, it ask "Which Schedule SE form did you use in 2019?" Im new didn't have an SE form last year?

SE Family leave credit is for self-employed persons who did not go to work for up to 50 days due to becoming ill, or having a family member they cared for becoming ill. 

The next question is about Schedule SE. When filing as self-employed on your individual tax return, the self-employed income is reported on Schedule C. 

To answer the question regarding if you used the SE Short form or SE Long form, answer 0 if you did not have self-employment in 2019.

Otherwise, get your 2019 Tax Return PDF if it is not already printed. Scroll through looking for your 2019 Schedule SE with Section A (Short) or Section B (Long) filled out.

For more information, see: COVID-19-Related Tax Credits for Paid Leave Provided by Small and Midsize Businesses FAQs, which provides Overview of Paid Sick Leave Refundable Credit and the Family Leave Refundable Credit.