You must pay taxes, local, state and federal. If your state has a sales tax on services then it must be paid.
First thing tomorrow contact the local office of the SBA - Small Business Administration. Their help is mostly free (they usually charge for topic-specific seminars) plus they can help you find a mentor from SCORE - Service Corps of Retired Executives.
You really need to develop a business plan and decide whether to incorporate as an "S Corporation" or as an LLC (Limited Liability Company). You absolutely need to create separation between your business finances and personal finances. The way you're operating now leaves your camera equipment, car, home - anything of value - open to any judgment against you as a photographer.
Suppose you contract to shoot a wedding and just totally blow it. Maybe your camera decides to die half way through the ceremony or you get a bad memory card or the flash dies or you have a couple of drinks (major no-no). You don't live up to your contractual obligations and next thing you know you're being sued. Judges don't accept excuses. What if the judge orders you to pay punitive damages equal to twice what you charged for the wedding? Showing the judge your empty pockets won't elicit any sympathy. He'll simply order you to sell your camera equipment and your car and whatever else you have of value and pay the plaintiff. If that isn't sufficient he can place a lien against your future earnings. A few years ago a bride sued her florist for $35,000.00 because the colors of the flowers in the arrangements he provided didn't perfectly match those shown in his catalog.
Good luck!
