Vurrha Jantsk: The Emperor sent you? I understand his wishes. But first you need to retrieve a datadisk from a Rebel base on Dantooine. Return after you have it and after it has been altered by an Imperial operative in Kaadara.
Travel to Dantooine and retrieve a datadisk from a Rebel base there.
Once at the Rebel base, you will need to go down and click on a data disk in order for the quest to update
Vurrha Jantsk: You have the disk? Good. Let the Emperor know that I am prepared to do his bidding.
Report to Emperor Palpatine
Return to Emperor Palpatine at his retreat on Naboo.
Head back to the Emperor's Retreat on Naboo and speak to The Emperor
The Emperor: The Jantsk mercenaries are going to intimidate Queen Kylantha and demand military and financial aid.
This completes the quest. Continue your conversation with The Emperor to receive the next quest
You: What are my orders? The Emperor: You are to clear the way for the mercenaries by ridding the Queen of her security. There is little enough of it, as she believes herself to be quite safe. We are going to convince her otherwise.