Thank you in advance Experts! As my user name states, I am a newbie in Oracle. We have R12 and at times in the receivable module, I have to credit the sales tax from a transaction. I do this procedure by going Transactions->Transactions. (Press) F11 to do a query on the invoice. Enter invoice number and (Press) Cntrl F11. In the toolbar I select "Actions" and scroll down to "Credit". I am now able to adjust the invoice inside the "Credit Transaction" dialog box that comes up. For the reason, I enter "Tax Error" on that line. In the "Credit Allocation" filed, I select 'Tax.' Then I proceed to enter the negative dollar amount on the tax line that I want to credit. - At this point, I do a Cntrl 'S' to save (or click on the 'save' icon at the top). In most cases, the system calculates, and then allows me to select 'Complete' to finish the transaction credit. However, in some instances, I am 'Saving' and then I get an error message that says "Error in Commit Call." and then it doesn't allow me to 'complete' the credit. Do you know what may be happening? It only happens on a few accounts, and regardless of dollar amounts. Otherwise, I am able to clear most that need to be done. Thank you!