Assuming you are referring to a Solo 401(k), I'm assuming the business is listed on your Schedule C when preparing your individual return.
If this is accurate, then yes, follow the steps in the following link to determine the Solo Roth 401(k) information that you can include in your return. The link includes information for entering the matching employer contribution amount as well as information on maximizing your allowable contributions.
How do I enter a Solo 401(k) in TurboTax?
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"