You are yourself, you can do everything as you like for investing, not need a company, which includeing buy/sell stocks, rental houses, work as a slave for other companies.
You fill TAX return in your 1040 Form for all your income or loses, very EZ. EZ means easy.
Buy a TAX return software, answer all the questions it asks you, then, you are done.
I am going to do it this weekend, as I did for the past N years.
