Custom Tax situation

[sekhemre]

The standard sales tax is fairly easy to set up and configure. My question is how would I enter a custom tax? There is one specific new tax in California: the Covered Battery Embedded Product tax (1.5% of the purchase price, up to a maximum of $15.00 per device, not the whole order). I am not sure how to set that up in Phoca Cart. Does anyone have any thoughts or suggestions on how to set up a tax like this?

Thanks for any help on this matter.