Error in receivable

There is some issue with account receivable, in some invoice even though i enter amount receivable excluding withholding tax but in some invoices it show amount receivable which is witholding tax but in some invoices it did not show it

You need to post screen shots illustrating your problem. Post screen shots of the edit screen for a sales invoice including the withholding tax and the finished view screen that does not.

I suspect you may have forgotten to click Update.