Where to enter deduction for software licenses?

I'm also self-employed and develop software. I needed to buy a software tool and license last year. I know I can deduct this, but where/how do I enter this in TurboTax? Is there a specific category like when you deduct a new computer? 

Additional, thought if you buy a computer needed for work, you can deduct a part in three years. How to enter this for the last year? A part was deducted two years ago but forgotten last year.

Thanks.