Do I reduce my self-employment income by the amount I added to a solo 401K

[DRTT]

If I have to manually reduce my self-employment income manually, how do I do that in turbo tax?

[DoninGA]

If you are using the TurboTax online web-based editions -
Click on Tax Tools on the left side of the program screen. Click on Tools. Click on Topic Search. Type in self-employed retirement. With the key words highlighted, click on GO.

[AnnetteB6]

For more information about entering Solo 401(k) information, see the following TurboTax help article:

How do I enter a Solo 401(k) in TurboTax?

@DRTT