As part of our Ask 2 series, the newsroom will answer your questions about all things Houston. Question: What will prevent my mail-in or in-person vote from being counted? Heres what you need to know to ensure your vote is counted whether youre voting by mail or in-person. Mail-in ballots can also be hand-delivered by the voter on the day of the election. Early voting begins Tuesday, Oct. 13, and election day is Tuesday, Nov. 3.