I would like to add a bathroom and I have a ejection system that pumps up how can I add another toilet to this line?

Hi Rosesbus...

Most likely your ejection system is encased in concrete, right? If this is the case, you need to break out concrete near the ejector inlet pipe and will connect the plumbing for the new bathroom into the inlet pipe underground...

Is the new bathroom going to be upstairs or down in the basement? Let me know more here and I can probably tell you more, OK?

Mark