Income tax for foreigner working in Texas, US

Hi,
I'm recruited by a company located in Texas and we have a contract in 1 year and I will turn back to my country. I'm wondering if foreigners have to pay income tax or not? And if yes, how to calculate it?

Thanks for any help,
Khoi

Hello Khoi.

Welcome to Expat.com! :)

This article could help => Income tax in the USA.

Thank you,
Aurélie