If the Item sales tax group and Sales tax group combination is missing at sales order invoice system should through the error message before posting

While Posting the Sales order Invoice, system should validate the Item sales tax and sales tax group. If the sales tax group is missing in sales order then system should give error message or Infolog. However this same functionality is working fine in Free text invoice posting. If the post the free text without tax combination system will give the Infolog before posting. Error message-> Both the VAT group and the item VAT group must be specified on a free text invoice line. Prerequisite:- Account receivable->Account Receivable Parameter-> Ledger and sales tax tab Enable check box Mandatory item VAT group General ledger-> General Ledger Parameter->Vat Tab check tax code= Error Validate VAT code marked "Yes" Repro Account Receivable->Invoice->All Free text Invoice->New Select main account 110180 Enter Item sales tax group Blank sales tax group filed enter amount Save Error message->Both the VAT group and the item VAT group must be specified on a free text invoice line. LCS Issue 521475