So I am working on a quest but I need a bit of help in the scripting area. Basically I need a script that will advance the quest stage to 20 when the player has got two items. The first item is taken from a troll and the second item is in a chest. I'm sure that there will need to be an "if" statement somewhere but I have little experience with papyrus and I'm in a bit over my head.

Have you read the Papyrus tutorials on the Creation Kit Wiki?

I have a bit but I'm not finding any thing that is helping me advance the quest at the same time with two items