For income taxes, you are required to report all your income, regardless of whether or not you have a license, or whether a license is even required. You are expected to keep accurate business records of your income and expenses, even if you don't get tax paperwork from your clients. Your report your income, deduct your ordinary and necessary expenses, and pay income tax and self-employment tax on your net profit.
If you also have a W-2 job, you still file just one tax return that reports all your income. It will have a schedule C for the self-employment as well as including the W-2.
You said you have been "freelancing" since May but you started as a PA in September. You need to determine if you have two different sources of business income that need to be reported on 2 different schedule Cs, or if you really just have one "business." Basically, you can combine all your business activities on one schedule C if the activities and deductible expenses are similar. If they are very different, you need 2 schedule Cs.
For example, someone who does carpentry and also prepares tax returns in season would need to file as two separate businesses. Someone who drives for Uber, Lyft and Doordash can file as a single business, since the activities (ride share) are essentially similar.
