To sort taxes in ascending/descending order during bulk edit of the existing products please follow the below steps:
Step 1: Go to Products and Services section, here click on Actions and select Bulk edit.
Step 2: Select the products you want to edit and click on Edit .
Step 3: Click on 3 Dots >> Sort Ascending/Descending.
Step 4: Change the tax% for the products and click on Submit .