Currently in discussions to acquire a ~$5M business with $10M in revenue, have legal diligence and accounting diligence (QofE) covered, but was wondering how often others use tax diligence for their transactions especially at this small of a size pre-close. Deal is structured as an asset purchase and I am trying to be mindful of fees, but don't want to be penny wise pound foolish.

If I do require tax diligence, what is the minimum type of scope that should be covered?

The target has accountant reviewed financials and has a CPA file their tax returns.