Customer Sign Up - Tax ID

Hello,

Is it possible for a Customer to set his Tax ID from the Website?

It seems like this field is not present in the account edit and addresses. I think it would make sense for the client to provide his Tax ID when he is filling his billing address.

Any reason for this? And if so, what is the solution. Of course asking the client for the Tax ID manually is out of question.

Thanks!

Solved it by adding a custom Tax ID web form with the tax-id field for the client to change.