I have a 6x6 wood support post, just at the bottom of my stairs in my basement. I want to pull that out, and put a support beam from the barring wall on the left side of the stairs, over to the wall for the basement bedroom. the span is just over 7 feet. How big of a wood beam do I need? I have the space to put in a 6 inch wide laminated beam, that could be as thick as 12 to 14 inches. will that work??
You can't just pull out a vertical support and slap up some off the cuff theoretical remedy based on, "what you can fit". It needs to be calculated by someone qualified who actually visits your house.
Try calling an engineer or architect.
You can't rely on clowns on the internet, It's like asking a monkey with a stick beating on a termite mound. No good will come of it.