To start this quest you need to talk to Sohkaa Esof near the Aya docks.
Trading Favors
Related points of interest
Mission objectives of Trading Favors
1. Meet the Resistance leader on Voeld
2. Speak to the Resistance lookout
3. Search Sohkaa's navpoint on Voeld for the missing supplier
4. Investigate the supply camp
Scan Scorch Marks, Supply Crate, and Angaran Corpse.
5. Defeat the kett ambush
6. Recover the supplies
7. Deliver the weapons to Sohkaa Esof on Aya
Sohkaa Esof's supplier was killed by kett, but you recovered the lost shipment - weapons intended for the Resistance. Take the shipment back to Sohkaa on Aya.
Now you can trade with him.