When extending a material with more than 15 tax classifications you receive an error that the 16th tax field does not exist in the screen
Transaction 10x, Studio 11
The default view only allows for 15 tax classifications, the script is unable to see values past the 15th row resulting in error
This will require a GUI script with an if on index condition to locate the correct tax classification(s) for update.
Page down commands do not work in either of the screens containing tax classifications.