@Cyber LibertyIt is too late for this election, to cancel a mail ballot, get another one mailed to voter, fill it out and get it in.
Canceling a ballot at early voting or on election day:
If a voter is in his/her proper precinct polling place and the county uses paper ballots, and voter makes a mistake, voting for someone he/she did not want, or other mistake, the voter can take the ballot to the Election Judge and he/she will take the paper ballot, notate on the back of the paper ballot why it was returned and give voter a new ballot.
Canceling a ballot at early voting or election day, using Electronic voting machine:
If the voter makes a mistake, meant to vote for a different candidate, or other voter mistake, notifies the Election Judge, and the electronic ballot is removed from the machine and voter votes again.
Cyber, if Biden wins, I think that is four more years of Obama as Biden will stay in constant communication with Obama, and do what he says.