My company is 1-2 years old. Can I apply for a 2-week German business visa with 1 or 2 year's tax returns? All my statements of accounts are fine. What is the right way to go about it?
If the rest of your application looks fine, you can do that.
For a business trip, you have to explain where you are going and whom you will meet. (For a tourist trip, you would have to explain where you are going and what you want to see. Same kind of visa.)
Either way, you personally should have stable finances which make it appear likely that you will return to your homeland.