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Have you tried leaving Line 12 blank? Checked for Form Errors? With the form displayed, click on Errors at the top left of the screen, next to Open Form. The error message is displayed at the bottom of the form.
Since the 0 in your screenshot is red, this indicates an error. Right-click on Line 12 to for more info on this line. You may need to review your Business Asset entries again.
Here's a screenshot of Form 4562, showing the lines referred to.
