I took the maximum personal 401k solo contribution. How do I get Turbo tax to calculate my tax liability if I wish to make a smaller employer contribution or none at all?

I took the maximum personal contribution on my solo 401(k)($24,500)  However,Turbo tax is telling me that I have to make an additional employer contribution of >$10,000.00 to my solo 401K.  I want to make a smaller employer contribution, but Turbo Tax does not appear to permit that.