And it came to pass in those days, that there went out a
decree from Caesar Augustus, that all the world should be
taxed (KJV, rather literal).
Now it came about in those days that a decree went our
from Caesar Augustus, that a census be taken of all the
inhabited earth (NASB, even more literal).
In those days Caesar Augustus issued a decree that a
census should be taken of the entire Roman world (NEB,
About this time Caesar Augustus, the Roman emperor,
decreed that a census should be taken throughout the
nation (LB, paraphrastic).