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On claiming mileage and home office deductions
Can she claim deductions for her driving to and from work? Considering most people use their cars mostly to commute to/from work, there must be limits to what you can consider "claimable" and what you can't, otherwise everyone would claim back 80% of their mileage. No, she can't. But if she's driving from one work site to another, that's deductible whether or not either of the work sites is her home office. Can she claim deductions for her home office? There's a specific set of IRS tests you have to meet. If she meets them, she can. If you're self-employed, reasonably need an office, and have a place in your house dedicated to that purpose, you will likely meet all the tests. Can I claim deductions for my home office, even though I have an official work place that is not in my home? It's very hard to do so. The use of your home office has to benefit your employer, not just you. Can we claim deductions for our home internet service? If the business or home office uses them, they should be a deductible home office expense in some percentage. Usually for generic utilities that benefit the whole house, you deduct at the same percentage as the home office is of the entire house. But you can use other fractions if more appropriate. For example, if you have lots of computers in the home office, you can deduct more of the electricity if you can justify the ratio you use. Run through the rules at the IRS web page.