My client is making a contribution to a self employed 401k for he and his wife in the amount of $77,059

B. on this form says -Total from the Keogh, SEP and SIMPLE contribution worksheet for the owner of this trade or business is $77,059

The question says - Enter the amount, if any, attributable to this trade or business only

Would that amount be the $77,059?

Or is it asking how much are they personally contributing vs the business? (however it is a sole proprietor, so that is still them personally, correct?)