Dear Guestes, to get Smart level 3 code, you need to complete 15 bookings within a 1-year window and fill out the smartform.
Smart FAQs:
How to Progress in the Smart Program
To unlock Smart Level 2 or 3 you’ll need to complete 10 or 15 bookings within a 1-year period.
Eligible Bookings
Any completed booking for stays, rental,  will count towards your Smart progress. Note that a booking only counts after it’s fully completed, such as after you’ve checked out of your accommodation or returned a rental car.
Â
Updating Your Progress
After completing the bookings, you have to fill out the smart form to get the smart code for level 2 or level 3.