If capital gains was my only income. Do you have to pay taxes on all gains/profit? Or is there a certain amount you make before you get tax?

[Mike9241]

it depends on how much and whether the gains are short-term or long-term

regardless, even if tax is $0 you may still have to file to report them.

[tonymac]

Let say under 30,000 in gains for the short term.