Request for Taxpayer Identification Number and Certification
Form 1099-G is used to show payments that you received as income from government agencies (state, local, etc.)
Power of Attorney Declaration of Representative
Application for Employer Identification Number
Form 1099-MISC is used to show payments that you paid at least $600 to individuals for rents, veterinary services, or other income payments.
Heavy Highway Vehicle Use Tax Return
More General Forms
The IRS website has many more forms and publications, click below to check them out