Oh, sorry; I forgot this one:
If a Broker oversees your work and gives you work assignments, you would be their employee. They send you to ADP. Your broker, the employer, can also have hired me or ADP to "run payroll" but the Broker still is your Employer.
Many variations, that all depend on Who You Work For. Do you work for yourself?
"Level Up" is a gaming function, not a real life function.