Correcting 5500 Filing

[Guest]

We just took over a sponsor's standardized pension and p/s plans. There are two plans with two adoption agreements. The plans are 001 and 002. The account has been filing one 5500 since 1973, combining financial and participant data, indicating both plans in question 6c, but using the 001 number.

In our opinion this is not correct, but we are at a loss on how to correct it. Can we continue filing this way? Start filing 2 5500's and explain the situation to the IRS when they ask for past returns on 002? Notify the IRS/DOL and apply for correction under the VCR-like 5500 correction program? Any thoughts are welcome.