Created New Tax Status Code and a Tax rate for this Status, but its not available for selection in P

Hi Team,

We have setup three tax statuses, VAT Standard, VAT Exempt & VAT Zero & three tax rates, VAT 5%, VAT Zero & VAT Exempt. Each Tax Rate is under its relevant tax status. This configuration is ALREADY IN USE. Now there is a requirement to create a new tax rate, NOT APPLICABLE. For this purpose we created a new status NOT APPLICABLE and assigned the new Tax rate under it.

But when we are creating an invoice in payables, in the tax details, we are able to select the Tax status code NOT APPLICABLE, but the tax rate code is not available for selection. Its coming Blank.