Where is a good place to store my tax return for a short term investment?

[DerpSandwich]

I don't know much about this stuff, but I know that anything that earns you real interest is long-term. Short term, small value investment is going to most likely be active on your part, like buying and selling stocks and speculating goods and whatnot. Slow-and-steady gains take a big chunk of change over the course of years.