I assume there is an error reported on the 1099-SA?
Not knowing what the error message is, the simplest thing to do is to delete and re-enter the 1099-SA.
You can delete the 1099-SA by either on the "Here's what we have so far" screen where there is a table showing 1099-SAs already started, or you can do the following:
*** Desktop***
1. go to View (at the top), choose
Forms, and select the desired form. Note the Delete Form button at the bottom
of the screen.
*** Online ***
1. go to Tax Tools (on the left), and
navigate to Tools->Delete a form
2.
delete form(s) 1099-SA (if one), 8889-T, and 8889-S (if one)
Now restart the HSA interview, skipping past the 1099-SA section when you come to it.