How to add section 179 + bonus depreciation to taxes

It depends. Section 179 and Bonus Depreciation are related to assets held by your business (Schedule C) or rental property (Schedule E). Once you add assets for depreciation to your activity, TurboTax will ask you about these accelerated depreciation options. If this is a new asset, you may decide to use these options for the property in the year you started using the asset. If this is an existing asset, TurboTax provides boxes for you to report the accelerated depreciation you took in prior years.

The easiest way to find any section of TurboTax is to open your return and use the Search box at the top right side of the TurboTax header. Click on the magnifying glass, type in the topic you need, hit Enter, and click the "jump to" link to go directly to beginning of that topic.

Or go to the left column in TurboTax Online and click on Tax Tools >> Tools >> Topic Search. Type in your topic, then click the topic in the list to go directly to the start of that section.

See these articles for more information: 

• What is Depreciation?
• What is a Section 179 deduction?
• How do I handle capital improvements and depreciation for my rental?
• IRS Pub 946 How to Depreciate Property