How to Sell Above MSRP

Question: "With the increasing shortage of vehicles, we’ve noticed dealers selling cars over MSRP. We’ve also been asked if there is a preferred way to do this. In other words, is it better to have an addendum that includes some perceived value to justify the markup – or is it okay just to raise the price?" So is it okay to sell above MSRP? And if it is how should you do it to ensure you aren't breaking any laws?