If you've had your shares for over 1 year and you want to sell some, maybe open a different account for the shares you decide to trade, this will make taxes very easy and clear to separate your long term and your short terms for both gains and loss reporting. You can either set up a share transfer between accounts, transfer funds from one account to the other after selling shares, or fund a new account, then pay yourself back after selling shares (fastest)
By the way, I'm not at all a professional at accounting, I'm only good at trading long term trends... that being said I only read somewhere online about having separate brokerage accounts, something you may want to look into further before executing any trades.
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