You get an accountant and don't ask on HN. You need to decide how much you will reinvest into the site and keep for a rainy day fund. HN can recommend what they

You get an accountant and don't ask on HN. You need to decide how much you will reinvest into the site and keep for a rainy day fund. HN can recommend what they've done, but please take it as a grain of salt, advice you got talking to some buddies at the bar, and get a good financial advisor and accountant probably one that specializes in tech would be good if available.