Documentation for very short-term work through Venmo?

Sorry if the title is vague, but I wasn't sure how to condense the situation.

I was hired as an independent contractor for a test prep company and worked for a week before the head realized they had overhired, and I was terminated. They are going to pay me for the work product I produced and requested to do so over Venmo. Is there any documentation I need to request for tax purposes next year? The amount is small ($275), but I wanted to double-check that I was covering my bases. Thanks!