"There will be no taxes in Forwick, he says, and his state will soon issue its own currency."
In this sentence, 'issue' corresponds best to definition 4. Definitions 1, 2, and 3 are also appropriate here
@vonpaulus "I always thought that the word issue colud be a synonim of problem. Am i right? Thanks"
Yes, according to "The Synonym Finder" (New York, 1986), 'issue' as a noun is a synonym of 'problem.' As a verb, 'issue' is a synonym of 'distribute' or 'dispense,' which is the meaning it has in this lesson.