Still young so very new to taxes and all. What website/app is the easiest, fastest, and most privacy respecting. Even open source if possible too.
I feel like using the popular ones like turbotax will make their own logs and also sell tax logs to amazon Facebook and all. I don’t know if there’s a law where they can’t but even if there is a law I doubt they respect that.
You can do DIY 
I’m assuming you’re American (because my understanding is American taxes are among the hardest to file). IRS Direct File looks promising, as it is a pilot of the IRS’s in-house alternative to tax form preparation software. It’s currently only an option if you don’t have self-employment or business income or claim certain tax credits. And it’s currently only available for residents of a dozen states. Additionally, only Arizona, California, Massachusetts and New York currently offer complementing forms for your state (as opposed to your federal) taxes.