Will I be allowed back into Portugal if I try to return after my student visa expires?

You don't give enough information to answer this fully. This is a shot from the hip. I assume you are a US citizen with a valid US passport and had...

Can I work for a startup in NY as their CTO as a Canadian and get a TN?

This is somewhat of an immigration question. No you cannot get a US TIN as a person and work in the US unless you go through the immigration/work...

During the processing of I 130?

This is an immigration question. pass to that area.

The jurisdiction could be at the point of sale -also check the sale agreement or contract for a specified jurisdiction, although AXA being a French...

This is an immigration question. Pass to that area.

How much money is required in bank account to obtain a visa to enter Ghana

Ask the Ghanian embassy or consulate. They may have the requirements on line.

Depending on the state he wishes to set up in, he can either register the business itself if it is a corporate entity (this is allowed in Texas) or...

If someone gives you a blank check, with their signature on it. Am I able to cash it?

I think you need to talk to a business lawyer in your area. Also, you don't want to cash a check from an account that can't cover it.

I want to about I-327 adviced ?

This is an immigration question. Pass to that area.

It's been over 30 days and I haven't received my case receipt regarding I-765 filing?

This is an immigration question. pass to that area.