What significant change did the Twentieth Amendment bring about regarding presidential terms?

The Twentieth Amendment to the United States Constitution, ratified in 1933, primarily focused on the timing of presidential and congressional terms. One of its most significant changes was to move the inauguration date of the President from March 4 to January 20. This was aimed at reducing the "lame duck" period—the time between the election of a new president and their inauguration—thus allowing for a smoother transition of power and a more timely response to the needs of the government. By shortening the time between the election and the beginning of a president’s term, the amendment intended to enhance efficiency in governance and reduce the duration in which outgoing officials remained in office without being directly accountable to the electorate.

The other options do not accurately reflect the changes laid out by the Twentieth Amendment. While presidential power, income tax, and voting rights are important topics in U.S. governance, they are not directly addressed by this particular amendment.