Stopping EBS Tax to calculate Tax on my AR invoices

Hi ,

We are creating the sales orders through API by having the Tax event as INVOICING , in header level transaction type , so that we have the user required ,  tax value being updated at the line level of my orders.

And when the data is pulled into Receivables , the EBS tax is calculating the tax and is updating my AR invoices tax information. We do not want this to happen and have the same user entered tax to be present on our AR invoices as well , instead of EBS tax re calculating tax again.

So  , can you please help us in finding a way to stop EBS tax calculating the tax on my AR invoices when the data is pulled into Receivables. And we are using 11i Version.