The Maryland requirement applies to any Maryland business that has even one W-2 employee IF they use an automated payroll system and have been in operation for at least two years. You can satisfy this requirement by using MarylandSaves or any other form of qualified retirement plan.
Qualified plans include a plan qualified under Internal Revenue Code sections 401(a) (including a 401(k) plan), qualified annuity plan under section 403(a), tax-sheltered annuity plan under section 403(b), Simplified Employee Pension plan under section 408(k), a SIMPLE IRA plan under section 408(p), or governmental deferred compensation plan under section 457(b). It does not include payroll deduction IRAs.