Cleaning business LLC taxes

i this is my first year doing my taxes as a LLC owner , I don’t have employees and it’s really just me but I wanted security therefore I registered my business in December of 2025. The same day I registered the business I also open a business bank account I just have an issue as to where I should go to do my taxes ? Last year I did my taxes through free tax USA but I FEAR the IRS and I’m stuck on how I should go about my taxes ? I sadly don’t have any book keeping sources or have taken a lot of my expenses into accountability. I want to know what should I do? I had my business for a while before i officially registered it. Please don’t comment mean things I genuinely want help.