where are newly purchased business assets entered

Business assets are entered as business assets under the self-employment activity (or farm activity or rental activity).

In TurboTax Online, follow these steps:

• Down the left side of the screen, click on Tax Home.
• Click on the down arrow to the right of Review.
• Click on the blue band labeled Review.
• Down the left side of the screen, click Federal.
• Down the left side of the screen, click Wages & Income.
• At the page Your income and expenses, click to the right of Self-employment income and expenses (or farm activity or rental activity).
• Click the pencil to the right of the self-employment activity.
• Click on the pencil to the right of Assets to enter each business asset.
• Click Add expenses for this work and enter 'Assets' if Assets is not listed.

See this TurboTax Help.