Find a local small business CPA to handle your taxes and to review your books etc. It is not that expensive and is so worth it in the end. For a small business starting out you don't need some huge firm with 100's of employees or that is super sophisticated, just find a few good local CPAs that work with small businesses and interview them to find one you mesh with. Sometimes getting the first full non-audit review (and definitely a full audit) can be a little expensive if you've never had it done and have a few years of history, but it doesn't have to be if you do it early enough. They can also review your state nexus as well to make sure you are compliant in every state etc. Usually they can point out common issues in corporate governance as well which is helpful. Of course, if you do good you will out grow them but that is ok, at least you won't have broke the bank to start.
Outside of that (and depending on your current success & needs), there are CFO consulting services that do this work and much more. Of course, most of them work in small teams and are more strategic to support businesses that are say 20-30+ employees.