1. Determine if you are required to file a tax return. You are required to file a federal income tax return if you are a citizen or resident of the United States or a resident of Puerto Rico. Your marital status, age, filing method, and income all affect whether or not you are required to file taxes.
proficiency testing. proficiency testing. a program in which specimens of quality control material are periodically sent to members of a group of laboratories for analysis, with each laboratory's results compared with those of its peers. See also: proficiency samples.
Defense Language Proficiency Tests. The Defense Language Proficiency Test (or DLPT) is a battery of foreign language tests produced by the Defense Language Institute and used by the United States Department of Defense (DoD). They are intended to assess the general language proficiency of native English speakers in a specific foreign language, in the skills of reading and listening.