Ok first 2018 is done, and you get a big refund, then in 2019 if you are in 12% tax bracket and lets say the Long Term Capital gain $4,000 ($6,000 sales price less $2,000 cost --just an example). The capital gain gets favorable treatment and it you remain in 12% tax bracket the tax on the $4,000 will be $0, that right $0. Google some articles on Long Term Capital Gain for 2018 or 2019 at tax rates are the same and read them.
