I am a green card holder but after a year here in the United States I decided to go back to my native country. Can I surrender my green card and apply for multiple entries since I want to travel as a tourist more than a US citizen?
Yes, you can surrender your green card, and yes, you can apply for a multiple-entry tourist visa. You would file Form I-407, Record of Abandonment of Lawful Permanent Resident Status, and then you would apply for your visa using the online DS-160. You'll also need to schedule an interview appointment at a US embassy or consulate.