script to use OM_TAX_UTIL.TAX_LINE in R12

  Hi Friends,                 

  Does anybody have any document on OM_TAX_UTIL.TAX_LINE for R12 regarding its input parameters and output parameters?

    Actually we have to apply a modifier at list line adjustment level(before OM calculates or updates tax info in tables) where the modifier amount is based on the amount of a particular tax. So here we use a formula in the modifier and this formula will call qp_cutom. In this qp_custom we will use OM_TAX_UTIL.TAXLINE  pass the sales order line required values to it as input and get the tax rate for a particular from output to this API. This we did successfully in 11i but we are not able to perform this in R12. So request anybody