Early in-person voting kicked off in both Washington, D.C., and Colorado on Monday.

Here is everything you need to know to cast a ballot.

There are two competitive House districts across the states that began voting Friday:

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This is a guide to registration and early voting. For comprehensive and up-to-date information on voter eligibility, processes and deadlines, please go to Vote.gov and the election website for Colorado.

Absentee voting kicked off in Colorado on Oct. 11. Residents do not need to provide an excuse to receive a ballot. The state proactively mailed ballots to eligible voters between Oct. 11 and Oct. 18. Those ballots must be delivered to state officials by Nov. 5.

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Colorado offers early in-person voting, but it varies by location. Be sure to check the state's election website for early voting dates and locations. 

Colorado residents can register to vote in person, by mail or online at any point during early voting and on Election Day. Oct. 28 is the last day to register to vote and receive a mail ballot.

This is a guide to registration and early voting. For comprehensive and up-to-date information on voter eligibility, processes and deadlines, please go to Vote.gov and the election website for Washington, D.C.

Washington, D.C., began absentee voting on Monday. Registered voters do not need to apply for a ballot, as the district began sending ballots to all active registered voters starting Sept. 30. Ballots can be returned by mail or in person through Election Day.

Washington, D.C., will begin early in-person voting on Oct. 28, and it will run through Nov. 3.

The deadline for residents to register to vote online or by mail was Oct. 15. They can also register in-person during early voting (Oct. 28-Nov. 3) and on Election Day.