I dropped mine off at the clerk's office.
I'm registered independent, so I got the Democrat ballot and the Republican ballot. I was irritated to see that they were color-coded differently, one yellow and one red. My name was printed on the return envelope and there was no privacy sleeve.
Gave them the Democrat one with Biden selected. Pretty sure I will change my mind by the real election day, the more I think about it. Oh well, too late to take this one back now. Oops.
Oh, and my daughter who's lived out of state for years, and who finally just stopped trying to get off the registered voter list here (she's registered in the other state), got hers. That one got shredded.