Hi everyone. Thank you so much for taking time. Client,1099 independent contractor has high net income on schedule C, no EIN number and has no employee. I need a hint that can client to contribute in SEP IRA and 401k SOLO simultaneity before April 18 for 2021? Also, maximum 401k SOLO contribute is $58000 but I was wondering that ProSeries limits to $19500! I think I confused how to find the part of capacity of being employee ( 401K SOLO) in contribute worksheet and where should enter the capacity of being  employer for SOLO about $58000? Hope someone can help to some get clarity.