Regarding sales tax, on the actual purchase itself, there is generally no sales tax due on the consideration paid for a company in equity-based deals. However, there may be sales tax ramifications on the purchase of assets in an asset-based deal. Most states have exemptions for assets transferred as part of an acquisition (for instance an “occasional sale” exemption), but it is always important to understand the transaction itself, including the actual assets transferred, timing of such transfers, etc.
Source: taxconnections.com