I see. Thanks again for your detailed explanation, @dmertz! I didn't realize that I needed to withhold Solo 401k contribution from paychecks, so I paid myself without deducting 401K, and then I contributed $13,334 (100% of my gross pay) to 401K out of my personal bank account.
To correct this, should I (1) first write a check of $11,883.76 (my gross pay - withholdings) from my personal bank account to the S-Corp to return the amount of pay I received that is equal to my employee elective deferral amount, and (2) then write a check of $13,334 (100% of my gross pay) from the S-Corp bank account to myself to reimburse me for the total of 401K employee elective deferral and employer contribution I paid out of my personal account?
Thanks a lot for your help!
