According to federal law, polling places must be fully accessible to all voters, including those with disabilities, and poll workers must assist them though the voting process.
If you request a helper, the helper cannot be the voter's employer, an agent of the voter's employer, or an agent or officer of the voter's union. The helper must respect the voter's privacy, not looking at the voter's ballot unless the voter ask them to do so.
According to the Americans with Disabilities Act (ADA), accessibility requirements; all polling places for federal elections must be fully accessible to older adults and voters with disabilities. In federal elections, every polling place must have at least one voting system that allows voters with disabilities to vote privately ad independently. Usually, this is a machine that can read the ballot to you (for people with vision impairments or dyslexia), and let you vote by pushing buttons (for people with mobility disabilities). Under federal law, voters with disabilities and voters who have difficulty reading or writing English have the right to receive in-person help at the polls from the person of their choice. Election officials (including poll workers) must make reasonable accommodations as needed to help you vote. Election officials must provide you with help if it's possible for them to do so. A voter with a mental disability cannot be turned away from the polls because a poll worker thinks they are not 'qualified' to vote.