Worksheets show I entered 2018 mortgage interest as reported on Form 1098 but not carried to Schedule A, why (just realize and taxes already filed)?

[ChristieB]

On your Home Mortgage Interest Worksheet, if 2d Is this loan secured by a property of yours? is checked as No, this will cause your Mortgage Interest amount to appear as $0 on your Schedule A Line 8. This question appears in the Mortgage Interest, Refinancing, and Insurance subsection of Deductions and Credits (see screenshot). 

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