Hi!
Ana Belen García Luque wrote:
3. The company I issue invoices with is not related to the translation business, but to a different field. The Italian company states that I can only issue invoices if the company is a translation agency. I fifn't know this and certainly, I have issued invoices before this way.
This is true. The company/freelancer can only issue invoices for the activity said in the form 036. If the translation activity is not part of the business, deliver a 036 with an additional activity and you'll be able to issue translation invoices on behalf of that company.
Ana Belen García Luque wrote:
2. Should I open a VAT number in Spain even though I already work for a company?
If you cannot get to an agreement with the Italian company, in spite of adding the translation activity as a business for your family company, then as a freelancer, your VAT number is your NIF number, so no need to ask for it.
I know a person working full-time who had to register as a freelancer to issue additional invoices.
Hope this helps a little.
María José Asís