You have 2 choices. The vet or you try things to help her pass the egg. When my U2 was egg bound the vet gave her an injection, which failed. She lubed her vent & sent her home with liquid calcium & metacam. I was told I'd need to take her to a BCAV, if she hadn't laid the egg in 36 hours, to have it removed surgically. This was her very first egg & the x-rays showed it was huge. After a ton of research I stumbled on what people that raise fancy chickens do when their hens get egg bound. They give them coconut oil via a syringe. They give them liquid calcium. They sit them in warm water, for 10 minutes, deep enough to cover their vent. I tried this & one hour later my U2 laid her egg. You would need to ask your vet how much liquid calcium for your size bird. I used about a teaspoon of coconut oil in a syringe & gave it to her slowly. I'm sure a Tiel would require less. Later she started laying every week, so I got fake eggs, which cured the egg laying problem.