Set up VAT id number as backend (not EU validate)

Hi,
I’ve a trouble setting up Invoicing plugin..

my scenario:

1. Setting up a directory with three different packages.
2. Always B2B sales.
3. Spain VAT rules requires a “Company name” and “TAX ID” fields for B2B invoices.
4. VAT is always applied
5. Directory customers are always in our country (Spain), not EU VAT is needed, our company is not EU VIES registered..

When setting up, I’ve disabled VAT Rules, “Alway apply VAT” and “disable VAT Fields”, because validate EU VIES VAT number is mandatory, even when “Disable VIES VAT UD Check checkbox is ticked.

We need to set the same as creating invoice in admin backend, insert Company Name and a VAT ID number, but not VIES validation is required, but I can not achieve this..

Could you help?

Jordi