I think I qualify to deduct my eMBA tuition as a business expense, do I enter the amount of tuition total, or minus what my employer reimbursed, and/or minus 2% AGI?

I do not qualify for the usual tuition credits due to my income, but after doing some reading, including on the IRS website, I believe I qualify to deduct my executive MBA tuition as a business expense. I'm not sure what to enter in the box in turbo tax however. Do I put the total cost of tuition? Tuition minus employer reimbursement? Tuition minus 2% AGI? I'm not certain what calculations I need to do and what turbo tax will do for me. Thanks.