self assessment for joint tenants property ownership with non spouse

My son and I own a rental property as joint tenants. At the moment we have an agreement I would take 100% of the rental income, my question is do I only need to submit a self-assessment and not my son as he doesn't receive any rental income as my understanding is joint property ownership which is not with a spouse does not have to be 50%:50% divide.

Hi,
Please have a look at the guidance on jointly owned property at:
PIM1030
Thank you.