As a US company that provides a service, do they need to provide (by law) access to all previous invoices?
What should they state in an invoice?
In Europe, a company that sells a service has a VAT number, for such the invoice needs to contain:
- Name of the client
- Name of the service provider
- Address of the service provider
- VAT Number of the service provider
- An unique indent number that can be tracked at least up to 5 years
If this company registered in the US, what does the law say?