I have a similar issue, although complicated by some calculation issues as well.
Client is 2 brothers – dentists. When I got their plan, I asked what type of business organization they had. And they said it was a partnership. Each year I have been calculating their cross tested profit sharing contribution using the IRS’ method for partnerships – ½ FICA and pension contribution reduces their compensation. Every year, they reported the maximum IRC compensation for the year to start with ($280k in 2019). Now they are thinking about adding a cash balance plan, and I just found out that each brother also has a S-Corp. and have had the S-Corps all along. The partnership pays the wages for them and the staff, and the profits flow through their respective S-Corps.
1. How should I calculate the contributions going forward – as a partnership or as an S-Corp? The payroll, including for the owners, comes from the partnership. The accountant thinks calculate it as a partnership, the actuary thinks calculate it as an S-Corp.
2. How do I fix what has been done in previous years, or is a fix required?
Thanks for your help with this.