I still have not filed my return yet, I think I am missing some forms but im not sure. I also am having trouble filiing some forms I have.
Use this checklist to see if you are missing something.
https://blog.turbotax.intuit.com/life/tax-documents-checklist-how-to-win-big-this-tax-season-53328/
As for where/how to enter the documents you have---tell us specifically what you are trying to enter so we can help.