why is my hsa not showing up under 2018-and how do I edit it?
The form for an HSA is the 8889. You should see form 8889-T in the list of forms, and 8889-S if you are married (even if your spouse does not have an HSA).
You make most of the form 8889 entries by going to the HSA interview. To do that, do a Search (upper right) for "hsa" (lower case, no double quotes) and jumping to the result.
Make sure you go through the entire HSA interview.
As to why your HSA is not showing up, what do you mean? What is not showing up?