I assume both of these returns at some point are connected together as they travel back to the main return. If that is the case I don't think you have to move either one. When the bedroom door is open, the return outside the bedroom is sufficient to pull air from the bedroom. When the door is closed, the return in the bedroom will do most of the work.

Thanks for responding. The one is the hallway services quite a big area on its own so I’d prefer if the bedroom one did its own thing. Plus the bedroom gets really hot in the summer so I think it helps cool the room better if the return is up high because the supply vent is in the floor across the room. So I definitely want to raise the bedroom return. I just don’t know if it’s a problem to have 2 return vents so close to each other both pulling in air at the same time. They might be fighting against each other in a sense. That’s my concern. So if that is a problem then I think the only solution is to then move the hallway one down. But if it’s not a problem then it’s easier to leave it alone...