Not necessarily. Your store is closing. There may come a time where they're only letting you work one day a week. You don't have to be "laid off." It's any time you earn less by working than you'd get on UI that you consider applying to get UI to make up your lost wages.
UI doesn't go by the job. They use ALL wages in the base period from ALL jobs to do the calculation. If you don't know your different weekly benefit amounts based on approximations by using the different start dates of a claim, you'll never know when the optimum time to file is or if you're going to earn LESS than you'd get on a partial UI formula.

