How to add dynamic adjustment to prices in model configuration pages?

Summary:

How to add dynamic adjustment to prices in model configuration pages, using price models?

Content (please ensure you mask any confidential information):

We have many price models that are used to calculate the prices of our products. Now we need to add a tax in all prices, but we don't want to go out changing every "Price List" price model to "Advanced" price model. The tax is not fixed, there is a table with some taxes and depending on some attributes (such as customer segment), we retrive the right tax from the table, so we need to use BML to apply the tax.