Please check your travel documents well in advance to make sure that they are still valid. Your passport, visa or identification card should not be expired until you return. Afghan Border Police immigration department at their counters in the Airport will check your documents for validity and Sign-in or sign-out Passports after arriving or departing from Afghanistan.
If you are not a citizen of Afghanistan find out below if you need a Visa to visit the country and how to get it.
Afghanistan Ministry of Foriegn Affairs Website www.mfa.gov.af | www.mfa.gov.af/en/page/4115/3903