📑 Very useful if you are preparing or issuing electronic invoices (CFDI) and you do not know the specific key of the concept or elements to be complemented within the invoice.• View the list of keys by catalog for:- Products and services- Payment Methods- Coins- Payment methods- Tax regime- Type of Receipt- Units- Taxes- Countries- Use of CFDI- Periodicity• Search by word, enter the keywords that are closest to the description of the catalog you want to locate and view the associated keys.• You can perform the search by key and obtain the catalog description.• It includes key suggestions of Products and Services for small business activities, trades and professional activities grouped depending on the line of business.• Includes class and specific product identifier in the case of the catalog of products and services.• View detailed information about the description or key.* This app is not linked to government services for consulting keys for catalogs of products and services. Its main purpose is to provide a quick search for such information based on public information.