You can't get a Return Time, as the other posters mentioned.
In the past, when it was on paper, you MAY have been able to show the paper
DAS to use the handicapped viewing areas for Illuminations.
But, the CMs in those areas do not have a reader, so can't tell who has or does not have DAS. you could use those areas with a wheelchair or a 'stroller as wheelchair' tag.
But, important to be aware that those areas can be crowded, are first come/first served and may fill up quickly.
Once you have entered, you need to stay.
Many people find it works better for them to just have part of their group stake out a spot where they can use other members of their group or fixed items like trash containers or wall to make some separation between themselves and other guests.