Assuming that as a Freelance Photographer you receive one of the following forms: 1099-NEC, 1099-MISC, !099-K, you will file a Schedule C (individual Tax Return) or an 1120-S, if you are an S-Corporation. The bottom line is that you are NOT receiving a W-2.
Now, it appears that the arrangement you have with your client is ordinary and necessary for you to be able to secure business from this particular client. Best Practices (transparency and proper accounting principles) will dictate to record the Sales Revenue that you receive as income and record the expenses you incur to offset the income received.
