I am from America
It keeps having my translate this prase, but not giving me the word bank I need to complete the word, I continually get it wrong, and it corrects me, but what it corrects me with isn't an option in the word bank?
There are two different answers you could give to this question. The intro lessons really drill into you アメリカしゅっしんです but
I've experienced in at least one of the questions it doesn't want you to use that word. It'll put アメリカから来ました in the wordbank instead which is a more literal translation "I came from america".
アメリカ - America
から - from
来ました - "kimashita" came (past of 来る - "kuru" to come)
It's an issue with the beta I think since that grammar really doesn't get taught until later lessons but gets thrown into earlier ones where it isn't supposed to be. If you have a japanese keyboard installed you can always switch to keyboard mode and input しゅっしん yourself if that makes you feel more comfortable since it's more familiar to you at this point.
The difference between the two:
"kara kimashita" is a more straight-forward "came from" as in "I was there and now I'm here".
"shusshin" is more like "my hometown is X" "I was born there"
I'd suggest enabling a Japanese qwerty keyboard on your pc (like mentioned here: https://www.duolingo.com/comment/27307167), it helps memorizing the sound of the kana's and helps with muscle memory aswell, since typing na will automatically convert it to な, and typing namae will suggest 名前 automatically.
This way you can answer it the way you have learned so far (which I assume is "アメリカしゅっしんです" without having to worry about the word bank.