What is form 5500-EZ for the Solo 401k?

IRS 401k form 5500-EZ is an information-only filing that is completed and filed by 401k plan administrators. As your own Solo 401k plan administrator, completing and filing this form is part of your responsibility in running your Solo 401k plan.

https://www.solo401k.com/blog/2018-solo401k-form-5500-ez-guide/