I have a business PayPal account. I have added an installment button for a product on my website. On checkout, the tax is not calculated or added to total. My tax table in PayPal is correct. I notice that the Buy Now buttons have tax instructions when you create them but the Installment Button does not. I searched the Questions already asked and thought I found the answer by adding the following code to the button html. It didn't work.
<input type="hidden" name="tax_rate" value="5">
How do I add the 5% tax to Payment 1 and to Payment 2 and it shows on the checkout and the invoice? I have a limited understanding of html and I am hoping it is something simple.