How do I setup GTL (Excess life) to deduct the premium the employee pays?

According to the IRS, if the employee pays premium for Life Insurance, you can deduct that from the annual taxable amount.  See below:

Example. Tom's employer provides him with group-term life insurance coverage of $200,000. Tom is 45 years old, is not a key employee, and pays $100 per year toward the cost of the insurance. Tom's employer must include $170 in his wages. The $200,000 of insurance coverage is reduced by $50,000. The yearly cost of $150,000 of coverage is $270 ($.15 x 150 x 12), and is reduced by the $100 Tom pays for the insurance. The employer includes $170 in boxes 1, 3, and 5 of Tom's Form W-2. The employer also enters $170 in box 12 with code “C.”