Sorry for the trouble here, my friend. It sounds like you are running into a built-in limitation in the software.
We designed Mockups and myBalsamiq to be like pencil and paper. We offer very limited interaction because we want to keep the app as simple and approachable as possible. We do have some workarounds for this (like the linking you discovered), but there isn’t one for changing tabs on the same mockup. It’s not something you can do with pencil and paper, so it’s not something you can do in the app.
I’m sorry if that is not the answer you were looking for, Pranay. And, of course, if I misunderstood your request, please let me know.
Thanks for taking the time to post your question. If there is anything else we can help with, don’t hesitate to give us a shout! We are here to help however we can.