Fedex shipping by weight(grams) + zones

[trader0337]

There has alot fedex modules.. Can somebody point me to the right one please?

I need something like:

1. calculate weight(grams) + zones based when buyer enter their zip code.

2. including tax if possible?

 

I have fedex corporate account, if we install fedex module, do I need to generate the key for fedex module base on my fedex corporate account? Is this call API or ?

 

I am confusing. Someone please help.

 

Thanks