Need help with bathroom base cabinet & angled wall

[Boogdaddy]

I'm new to CA and have been working with CA Premier X12 for about 2 weeks. I've also purchased Chief Experts Academy Training and have watched a few of the videos as I experiment with a design I'm working on. Overall, I'm figuring it out quicker than I thought I would. I was able to get through the kitchen cabinet design without much difficulty, but I'm struggling with this vanity. I have searched this forum, online videos and tutorials, training, etc., and I can't seem to find the information I'm looking for. It's possible I'm not using the right terms or verbiage in my search for info, so I thought I'd post a query. I am trying to place a base cabinet for a Master Bath vanity where the right side wall is angled at 45 degrees. Is there a single accepted practice for placing a cabinet such as this? I am attaching a screenshot of the relevant plan. I have placed a box (red line) in the location I want the vanity.