When utilizing a template for inventory upload, currently the only way to add multiple tax rates & Fees is to add column under your product and add an additional line for just the additional tax rate.

This makes things extremely complicated when trying to export the data and filter with Microsoft Excel.

Suggestion - Make the Tax Rates field on the template comma delimited so you may add multiple tax rates and fees on one line. This should be a simple fix.

I can provide screenshots if necessary.