How to sleep train my 22 mo old?

I desperately need help. My daughter will be 2 in May and she use to be in bed asleep by 830pm every day. Now since her sister was born in December, her sleeping habits have changed dramatically. I kid you not I cannot get this girl to go to bed. She will stay up till 5am and wake up around 12:30-1:30pm. I don’t even know where to begin. I’ve tried getting her settled down early but she refuses to sleep. I even tried waking her up early even though she just fell asleep at 5am and it’s nothing but her screaming, crying and then she will fall back asleep within an hour. I’m not sure what do to and I have to go back to work end of May and really need this fixed since I work at 6am. Any advice would be great!!