New partnership audit rules came into force in the US in 2018. Katten Muchin Rosenman LLP has published a number of brief updates outlining the new rules and the possibilities of for smaller partnerships to opt out of them, available at:
New Partnership Audit Regime Set to Take Effect in 2018 Proactive Planning Recommended
Are You Ready for the New Partnership Audit Regime
Electing Out of the New Partnership Rules