: - The foreign income exclusion (IRS Form 2555) - A housing allowance (Form 2555) - Tax treaty exemptions and exclusions (eg. 1040NR for F-1 and J-1 visas) - Foreign tax credits and other offsets (Form 1116) Additionally, federal regulations

the business tax return for unincorporated sole proprietorship businesses; businesses that operate in the form of an LLC, limited liability original research of the tax code to find tax-free fringe benefits, non-taxable income, and non-taxable reimbursements