No, you cannot deduction registration fees in Oklahoma.Yes, you can deduct the sales excise tax in Oklahoma. To enter the sale taxes: Open TurboTax. In the search box in the upper right, enter sales tax. Select the "Jump to" link in the search box. On the "Sales Tax and Income Tax" screen, select Continue with Sales Tax. When asked how you want to enter your sales tax, select Easy Guide. When you get to the "Major Purchases" screen, answer Yes. Continue answering the questions to enter your information.