The Bonus Series: Don't Leave the Planet Without It
There's almost always a Bonus Series. Which is good if you need XP and credits, and the missions usually give some really good mods, armorings, and enhancements.
Tython, Ord Mantell and Coruscant do not have a bonus series.
Taris: Talk to Strom inside the spaceport.
Nar Shaddaa: After Chapter 1, the quest giver is Maj. Tsel'rban on the Fleet, in the combat training section. If you really need to level up before finishing the Chapter 1 finale, you can go to Nar Shaddaa and pick up the bonus series from a woman in the starport. (The series is level 31)
Tatooine: Quest giver at the starport.
Alderaan (Republic): After Chapter 2, quest giver is Sgt. Collo on the Fleet, in the combat training section. Or, you can go to Organa Castle and find the quest giver in one of the side rooms. (Series is level 40)
Balmorra: Quest giver on the platform near the shuttle.
Hoth: Bonus series after Voss, get quest from a terminal on the shuttle platform in Voss-Ka. (Must be Level 47) Or, you can start the series from a quest giver in the landing bay on Hoth, around level 43.
*Belsavis: Bonus Series after Chapter 3. Pick up the quest on the fleet from a mission terminal near the Smugglers' hangar door (Republic).
Voss: Quest giver on the Shuttle platform.
**Corellia: None (Black Hole daily missions are available at 50)
***Ilum: After Chapter 3.
When you're done with your class quest, meaning you've finished Chapter 3, there are three quest givers on the Fleet.
All three are located near the Smugglers' hangar door on the inner ring.
*A mission terminal directs you to Belsavis for the Bonus Series, which will then unlock the daily missions.
**The holoterminal will send you to Corellia for the Black Hole daily missions. (You only have to see this one time, after that you can go directly to Corellia.)
*** A large, green Twi'lek will send you to Ilum for a follow up mission, but you do not need to complete this to access the daily missions or the flashpoints there.
Korriban, Hutta, and Dromund Kaas do not have a bonus series.
Balmorra: Talk to Captain Laverse at the spaceport.
Nar Shaddaa: The Nar Shaddaa bonus series is level 31. After you finish Chapter 1, you can pick up the quest on the fleet by talking to Agent Velloo in the Combat Training Section on the fleet. If you want to do this before you finish chapter 1, you can talk to Coloel Harok in the spaceport.
Tatooine: Speak with Sergeant Charnso in the spaceport.
Alderaan: The bonus series for Alderaan is level 40. You can pick up the quest after you finish chapter 2 by talking to Mistress Amaran in the Combat Training Section on the fleet. If you're not finished with chapter 2, you can talk to Lord Serjay Thul inside House Thul on Alderaan.
Taris: See Colonel Serab on the landing platform at the Toxci Lake Garrison.
Hoth: This series is level 47. Use the mission terminal on the landing platform on Voss to begin. Or, you can start the series from a quest giver in the landing bay on Hoth, around level 43.
Belsavis: After you finish Chapter 3, use the Mission Terminal on the inner ring of the fleet, at the south end.