As per IRS instructions for Form 8960, Line 9a: Enter on Form 8960, line 9a, interest expense you paid or accrued during the tax year deducted on Schedule A (Form 1040), line 9.
On the input for Form 8960, Part II, line 9a the program's magnifying glass takes you to Schedule A, line 9, but does not transfer the amount shown there. The only way I was able to input the amount was by overrding the program, which creates an error for e-filing.
