In a corporation, there is one vote per share owned, not one vote per shareholder.

The question arises as to where you will get the money to buy out a partner's heirs or another shareholder's heirs when that person dies?

In particular, any entity where disqualified persons are officers, directors, 10% shareholders or "highly compensated individuals" or where disqualified persons have more than 50% voting control, capital interest or beneficial interest.See: http://www.irs.gov/retirement/article/0,,id=163722,00.htmlIf your IRA does business with any disqualified person, the IRA is no longer an IRA as of the first day of the year when the transaction occured.

If the corporation has no AE&P (No C-Corp before), distributions that are less than the shareholder's stock basis are nontaxable.

I am looking for help with shareholder basis for s corp with 50-50 shareholders2019 basis schedules filed by prior CPA - She is not willing to share the shareholders basis (unprofessional)2020- Basis is at 180k for shareholder 1 and 49 k for shareholder 2.

The qualified business income includes the profit from an active trade or business and then also rental income as long as you operate as a pass-through entity.More specifically, this means your qualified business income includes the net income from an active trade or business as shown on the Schedule C and in box 1 of a partnership or S corporation K-1, the net rental or royalty income shown on Schedule E and in boxes 2 and 3 of a partnership or S corporation K-1, and then not the capital gains but rather the Sec. 1231 gains that may occur when a business sells assets used in the business.Qualified business income also includes REIT dividends, qualified coop dividends and qualified publicly traded partnership income of the taxpayer.What is not Qualified Business IncomeQualified business income amount does not include reasonable compensation paid to S corporation shareholders nor does it include guaranteed payments paid to partners.

What you need to research further is the ability of the court to look through the LLC to its shareholders. 

Well here's what he'd do... he'd put the whole thing in a corporation with himself and a buddy as shareholders.

@Dennis TierneyCould I use my own SDIRA to issue a non-recourse loan to an LLC of which I’m a minority shareholder (33%)?

See below:The qualified business income deduction for noncorporate taxpayer is applied to partnerships and S corporations at the partner or shareholder level.