Enos' monthly mortgage payment was $1800 last year, and on average, 8% of each payment was interest. If Enos itemizes deductions on his federal income tax return, how much can he deduct for mortgage interest?

E = annual interest payment

E = $1800*.08*12.

E = $ 1728

for Federal income tax return deduction,

If Enos is individual taxpayer at tax rate 35% bracket; the Standard mortgage interest deduction is $ 2030

Since Enos interest is less than standard then follow standard deduction of $2030.

If Enos is at 25% tax rate, Standard is equal to $1450, since Enos Annual Mortgage Interest payment is greater than standard, then Enos can apply deduction of $1728.