The SECURE Act permits an eligible small business to claim a tax credit for adopting a new 401(k) plan and/or a new automatic enrollment feature.
Qualified startup costs include the ordinary and necessary costs that a small business incurs to:
401(k) plans, Simplified Employee Pensions (SEPs), and Savings Incentive Match Plan for Employees (SIMPLE) IRAs qualify. 403(b) plans do not.
To be eligible, you must meet three requirements.
No because solo 401(k) plans do not cover non-HCEs. They only cover business owners and their spouses.
You must file IRS Form 8881 (Credit for Small Employer Pension Plan Startup Costs) with your tax return.