Edit Schedule 3 Form on Desktop version

Hi, 

 

I have purchased the TurboTax desktop version for Macbook, and input all my info as usual and I need to include a manual input to line 13 of Schedule 3 form in order to incorporate a claim of rights (I.R.C. 1341). However, the form is not available for editing. I can only edit a few fields in blue.

 

Can you please advise how to edit. Thanks