stock sold at a gain is only subject to federal and state taxes; no obligation to pay social security or medicare tax on that gain
if you have a loss, those losses can be offset against any gains. if you have more losses than gains, you can deduct up to $3000 of those losses as ordinary income in a year and then defer any additional losses to the following year where you can again use the remaining losses to offset any gains and then deduct up to $3000 of any further remaining losses against ordinary income. That continues into the future until all the losses are used up.
TT will handle this with no problem
