Do I need to pay taxes if I sell an alt coin for bitcoin then rebuy a different alt coin. I never took out actual USD so I am unsure how that would work. Or am I only taxes on actual USD made when I cash out?
If i am getting your question correctly, you are referring to FEE from trading site "exchange"
If i am correct, every transaction happpen within the trading site havee a fee, most of them are 0.1percent of the actual transactions.
But if you are not onto it i cant help you then.
FACT: every time you Deposit a token to the exchange you need to pay for gas.
once you do trade you need to pay the transaction fee on a trade of 0.1 percent.
once you withdraw you token or bitcoin to another wallet you need to pay for transfer fee again.