You should include the cost of your license in start-up costs in your tax return. IRS will allow you to deduct up to $5,000 in start-up costs and $5000 in organizational costs. Anything over these amounts will be amortized in future years.
See the article below for a list of what is included in start-up and organizational costs.
http://quickbooks.intuit.com/r/taxes/3-tax-deductions-available-only-to-startup-businesses/ .
You will need to use Turbo Tax Self Employed (online) or Turbo Tax Home and Business (desktop software) to complete your tax return.
After you enter your business profile information, you can enter your start-up costs. See screenshot below.
