I am only able to enter solo 401k contributions for my spouse, who does not have a solo 401k

solo401k

I am married, filing jointly. I have a job in which I receive a W2, but I am technically self-employed as an independent contractor. I am a personal services contractor with the US federal government, for context. I have a solo 401k for which I have contributed the maximum amount. However, when I try to enter my solo 401k contributions, I am only able to enter under my wife's name in the FreeTaxUSA software, which, if I do enter it under her name, results an incorrect total amount down the line as it gets connected to her business income.