This means you can turn it to any eligible quest giver - if you took the quest in Riverwood, you can complete it at the same NPC in Rorikstead.
Make sure you wait until they finish talking before you walk away. Talk to any of the new NPCs to receive a task.
This is required for the mod to function. To get this mod working, turn Dialogue Subtitles on in your settings. This mod is mostly the same as the original, with changes to be compatible with USSEP. Ever wanted to earn money without entering dungeons or doing dangerous tasks for potentially shady people? Yeah? Well, this is the mod for you, my friend! This mod adds 22 jobs for you to do around Skyrim, with shadiness and danger being optional.