What did the 22nd amendment do?
a. it gave women the vote.
b. it officially limited presidents to two terms in office.
c. it allowed the government to collect an income tax.
d. it permanently reduced the size of the federal government.

The Twenty Second Amendment limited the number of terms that a president could serve to two (so that means running for president only once if previously the person served as the president for more than 2 years)
The correct answer is:
B. It officially limited presidents to two terms in office.

This link explains it