Final answer:
The specific identification method for determining the tax basis of the stock being sold can be used when the taxpayer has maintained sufficient records to document which batch of stock is being sold.
Step-by-step explanation:
The specific identification method for determining the tax basis of the stock being sold can be used when the taxpayer has maintained sufficient records to document which batch of stock is being sold. This method allows the taxpayer to specifically identify the cost of each share that was sold and calculate the tax basis accordingly. It is particularly useful when the taxpayer is selling stock from different purchases with different prices.