How to stop iMessage from coming to Macbook
The only way for your iMessages to also be delivered to your MacBook is if they've been set up that way with the same Apple ID / iCloud account you've set up on your iPhone.

It's not 100% clear what you've actually done in the Send &amp; Receive settings on your iPhone, but just to be clear:


On your iPhone, go to Settings
Swipe up and tap on Messages
Now tap on Send &amp; Receive
Under the You can be reached by iMessage at heading, make sure that the iCloud email address used on the MacBook is not enabled.


This should rectify the issue. Let me know how you go.