Many congratulations on reaching goal. That's fantastic!
Lots of maintainers have success leveling off their weight by gradually increasing their calories. I did this by adding in an additional 50-100 calories at a time, recording how the increase was reflected on the scale then making adjustments as necessary. I find that I can eat, on average, an extra 300 calories above where I was as I was still losing and hold my weight steady.
Good luck as you begin maintenance and let us know if you have any questions or need some extra support!
Central European Time (CET), Venice, Italy
| current weight: -1.0 under