Vent line

I am starting a new bathroom in my basment and will be breaking out concrete to run my drain lines. can anyone tell me were i need to run my vent line from? there should be an attachment

You should have vents for each fixture, including the ejector pump. They can all tie in together (check code for min height).

The shower, toilet, and ejector are in a convenient line. But the sink will have to be vented and then possibly tied into the other fixture vents in the ceiling.