2024 Solo Roth IRA - getting 2 different numbers I don't understand

[caginaz1]

On the individual and Roth 401k plans tab, I input Roth 401k info of 23,000 elective and catchup of 7,500 (I'm over 59 1/2) for the total of 30,500.  My co made $34,754 Net income.  I checked the box to maximize contrib to individual 401K.  On the self-employed retirement deduction page, it says I can defer a max of $27,649. Then on the Your Retirement Contributions page, it indicates I can my maximum allowed to qualified plans is $1,798, which I would assume would be into the employer match?  But as this is a Roth account, is that limit correct or can I go up to the total of my net earnings, and add $4254 instead (I live off of other retirement income/SS, no w2 work, no other 401k)?  And I'd want to do it as a Roth Employer match?  

Thanks!