Where on the tax form can I see what added up to my 10k max deduction? I entered my first deduction (property and real estate tax) and I get the message I'm maxed out.

I've see this type of question asked before but haven't seen an appropriate response.  On my first entry for deductions I entered my property and real estate tax. I get the message that I have maxed out my deduction for state and local taxes.  My property tax was only 2400.  Where did turbo tax get any deductions before I even entered them?