I have a single member LLC pass through umbrella that holds all my individual STR LLCs. Can I pay myself as an employee so that I can contribute 72k after tax and do a mega back door Roth? Is it true I don’t need a C or S corp to do this? A friend does this using mysolo401k.net. He says I have to pay payroll taxes at 15%. I’m assuming that’s 15% of the 72k? He has the employer contribute 72k and the employee contribute 0