IRS Form SS4 - EIN application

IRS Form 2553 - S Corp election
IRS Form 2848 - Power of Attorney
Form I-9 - Employment Eligibility
IRS Form W-4
IRS Form W-9 - TIN and Certificate
IRS Publication 1542 - per diem rates
IRS Forms and Publications page
Check the status of your federal income tax refund
Regional Income Tax Agency