How do I pay my taxes while living in foreign country without having a US bank account?
There are several options but predominantly there are two-
EFTPS: The Electronic Federal Tax Payment System is a free service from the US Department of the Treasury. All federal taxes can be paid using EFTPS. You can make payments via their web site, a voice response system, or special channels designed for tax professionals, payroll services, and financial institutions. Quick, secure, and accurate, EFTPS is available by phone or online 24 hours a day, 7 days a week. You can schedule a business payment up to 120 days in advance or an individual payment up to 365 days in advance.
Official Payments: There is another third party vendor that several states endorse for tax payments. They are called Official Payments (sounds legit) and their web site is www.officialpayments.com.