I'm trying to estimate 2019 taxes for my son who is a single filer. He should have about 20k in earned income and we are deciding whether he should cash in on some long term cap gains on stocks. when i put the numbers into turbotax it is calculating a tax on the cap gains even though there is less than 39k in taxable income. I'm sure there is a box or something that i am missing somewhere because there should be not cap gains. please help
