HOw do I update the tax rate tables for legacy Tax

AI generated answer (using internal Slack threads):

To update the tax rate tables for legacy Tax in NetSuite, you would typically use the CSV import feature. However, it seems that updating tax codes via CSV is not directly supported unless you design your own import tool. If you're trying to update the "available on" dropdown list for tax codes, it's important to note that this option may not be available for all tax codes. The availability of this option can vary depending on the country associated with the tax code. If you're using AvaTax, it's worth noting that this is an external solution for handling taxes, where it makes a call to an API for tax results. If you're trying to edit tax codes that were not created by AvaTax but by a former admin, you may need to explore other options. For updating the tax code/tax rate for multiple lines on a sales order, this can be done via CSV import. You can refer to the NetSuite Help Center for more information on how to do this. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******