Calculating Tax at Opportunity Level

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  Hi

  My client does not want tax to be added at Opportunity product line item level. I have hidden the field on opportunity product form.

  Now, the revenue is selected as System Calculated. Everything went well but now he wants to Calculate tax as 10% of (Detail Amount+Freight Amount-Discount) and update that in Tax field on opportunity form and then used it in calculation of Extended Amount.

  I tried javascript on form on change of Detail Amount, Freight Amount and Discount but tax fields is disabled and nothing happened.

  Do I have to write a plugin on pre stage of Update on Opportunity to update Tax. Will that work?

  Tuesday, April 29, 2014 12:31 AM