Retirement tax questions

Where does TT show the calculations for the 401(k) allotment so I can check its work and see what exact amount I need to contribute to each part of the 401(k)? 

 

In my case: 

W2 company plan has 401(k). I contributed $9K

1099 self-employment business therefore has $10500 left for elective deferral

BUT, I can also contribute up to 25% of compensation for employer nonelective contribution. 

 

When I click calculate MAX, TT says the total I can contribute for self-employment 401(k) is $28K.  So I need to know what exact amount is elective deferral and what amount is for that 25% (employer nonelective contribution). 

 

Thanks for any help.