There really isn't any country called "Korea, South" but Republic of Korea doesn't fit either.  I wouldn't wait for Intuit programmers to change the specs -- either use just "Korea," or the fillable pdf form online. 

I wonder how people from the United Kingdom get around this artificial limit.  Or Afghanistan, for that matter.  

There was a story recently about how the British are trying to deport someone to the Dominican Republic because his father was from Dominica, another country 600 miles away.  (They want to deport his twin brother to Grenada because his mother was born there.)  They were both born in London.  Sometimes, those extra letters are needed.