Do I answer yes for supporting someone else if I paid someones rent and bought them food for six months in 2021 with no documentation?

In the context of working on your tax return, you would only answer 'yes' to that question if you expect to be claiming that person as a dependent on your return.

Take a look at the following TurboTax help article for more information about claiming someone as a dependent so you can decide how you should answer the question for your situation:

Who can I claim as my dependent?