OMG, this is why QB is not the right tool for this. You are going to need to learn manual data management.

You have the initial purchase as a new Asset.

And during the holding period, you need to enter the earnings that would need to be broken into Cap Gains, or Interest, or Reinvested Dividends.

Then, You "disposed" of the asset basis as Sale minus Basis = reportable gain (long term or short term). I would offset this difference to an Other Income/Expense account.

And I use Quicken for this; I teach QB and handle all my own investments and taxes, and I know this stuff inside and out, and I would Never Use QB for this.