USA
As a voter in the United States, you can cast your vote in federal, state, and local elections, which include electing the President and Vice President, members of Congress, governors, state legislators, judges, and local officials. Additionally, you may have the opportunity to vote on ballot measures, initiatives, and referendums, depending on your state and local laws.
If you are a US citizen and 18 years old, you may be eligible to vote in federal elections, such as the presidential election, as well as in some state and local elections, depending on your state's laws.
However, you will need to register to vote and request an absentee ballot from your state of residence.
You can do this by visiting the website of the Federal Voting Assistance Program (FVAP).