I am using Stripe in s2member Pro. I need the option to make tax optional for some users. There is only a global option to set tax rate, not a per-user option. I have tried using the ws_plugin__s2member_pro_tax_rates_before_cost_calculation hook but it doesn’t seem to fire before the checkout form is rendered. I have tried some other hooks I have found in the code but none have given me a way to alter the tax rate before the form is displayed.
It looks like someone else asked something similar way back in 2016 but got no response: Tax Exempt Option on Signup?. I’m hoping someone has come up with a solution since then.