Are you talking about an application form? Or have you already been offered a position, and now have to fill out paperwork?
If you're simply looking for an application form, then I'd recommend starting by seeing which stores are advertising vacancies on the Burger King website: https://www.bk.com/careers/global-locationg
If you need help filling out a form as a new starter at Burger King, I imagine they will offer you support if you ask your hiring manager or someone in HR.
