Once you reach level 20, the Bounty Tracker is available at The Farm. He will give you 10 bounties daily of various time limits and difficulty, including 2 bounties that can be completed within 1 year. It will be up to you to decide how you want to tackle these. Once you accept the bounty and complete it, return to the Bounty Tracker to claim the reward. If you run out of bounties, more will be available the next day.