Unable to Override/Update Tax Recovery Rate Code at Supplier Invoice Level

Hi,

I have enabled all the setups that are suggested in the note ID 1588011.1 but still system is not allowing to override the associated Recovery Rate Code. Can some one guide on this?

====Prerequisite====

1 - In the Configuration Owner Tax Options (COTO) setting for Payables, Standard Invoices:

Allow Override for Calculated Tax Lines is checked

2 - At the Tax level, the 'Allow Override for Calculated Tax Lines' flag should be checked.
3 - At the Tax Status level, the 'Allow Tax Rate Override' flag should be checked.
4 - Set The profile option 'eBTax: Allow Ad Hoc Tax Changes' is to 'Yes'.