Do you handle Click-Through Nexus for my US store?
No, we don't handle this tax. It's up to you to track the taxes based on the performance of your affiliate. Click-Through Nexus requirements are different in each US state. You can read the following articles for more info about this topic:
Additionally, we recommend you researching yourself as well as the article might not be up to date anymore. Despise, please make sure to always consult your local tax and legal expert.