PS1.7.8.5 Store not calculating US state tax rate based on delivery address

[yeahinabituk]

Hi, hope someone can help as I'm really struggling

We are located in the UK where tax is pretty simple - it's 20% VAT charged on all orders placed within the UK.

However, we are currently working on a PS1.7.8.5 store for a US based company (based in Florida). From our understanding the tax needs to be calculated on the delivery address at checkout (according to local state/city tax rate). 

We have enabled all state tax zones in international > VAT > tax rules. and tax rules are set to:

Enable tax - YES
Display tax in shopping cart - YES
Based on - Delivery Address
Eco tax - NO

-

Has anyone else had this problem and managed to implement a solution?  I've found a 3rd part called TaxCloud who claim to be able to be able to offer Real-Time API Sales Tax Calculation. But it comes in at £80pcm and there's no Prestashop integration available OTS, so we would need to develop one.

Thank you for your assistance in advance

Kind regards

Paul