Many of the Money default categories are automatically linked to tax lines. You can change the tax lines to which the categories are mapped, and you can map new categories you create to the correct tax lines. For a transaction to be included in tax reports and the Tax Estimator, it must be in a category that has been linked to a tax line. You can link a category to a tax line even after you've recorded transactions .
All the transactions in this category are now mapped to the tax line. You can map more than one category to a tax line.