How to Edit Tax Rates on Sage 300


  1.  Open Common Services > Tax Services > Tax Rates.
  2. Select a Tax Authority code.
  3. Select Sales or Purchases as the transaction type.
  4. For each item tax class, enter the applicable tax rates as a percentage. (For example, to enter a tax rate of 6%, type 6.00.)
  5. When you are finished, click Add or Save.