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Most states allow you to simply vote by mail now.
Frequently over simplified. For example, a lot of those states require you to go get your ballot notarized, which can be a bit of a pain or a little cost:
https://www.usvotefoundation.org/absentee-ballot-notary-witness-requirements
Some require you to include a copy of your photo id.
Voting in person is the safest bet to make sure your vote counts and not get disqualified because of some rule you failed to notice/follow.