Entering Real Estate taxers

I have tried the suggestions.  Importing info from last year defaulted to Standard Deduction.  I changed that to Itemized.  When I went back to Real Estate Taxes I could not enter them.  I fudged deductions to exceed the Standard and it indicated I should use it but I was still not allowed to enter Real Estate Taxes.  Only when I started a brand new return will it allow me to enter Real Estate Taxes.  I would like to enter info from last year but it appears I will not be able to.