TurboTax's individual 401(k) summary page has been a mess since its inception, more misleading than helpful.
Your total maximum permissible contribution to the plan is $27,625, the amount of net profit that remains after subtracting the deductible portion of self-employment taxes.
$10,208 is the maximum permissible deductible amount given that you have made $17,417 of Roth contributions and you maximize your contributions.
$4,625 is the difference between the amount that you have already contributed, $23,000, and the $27,625 maximum total contribution.
$23,562 is the number on line 14 of the TurboTax's Keogh, SEP and SIMPLE Contribution Worksheet. It is not the maximum that you are permitted to contribute despite what it says on the summary page. Line 14 in your case is your net profit minus the deductible portion of self-employment taxes minus one half of (net profit minus the deductible portion of self employment taxes minus the $19,500 regular elective deferral limit). That calculation simplifies to:
(net profit minus the deductible portion of self-employment taxes plus $19,500) / 2
which is a useless number to provide on the summary page. It tells you nothing about the amount that you have left to contribute or how you need to split up your contributions into employee elective deferrals and employer contributions. You are far better off looking at the Keogh, SEP and SIMPLE Contribution Worksheet than TurboTax's summary page.
