1 Duration between two dates â Calculates number of days. 2  Time and Date Duration â Calculate duration, with both date and time included.  Birthday Calculator â Find when you are 1 billion seconds old.
You are opting to tax land. For the purposes of VAT, the term âlandâ includes buildings. When you opt to tax, you can specify an area of land or a âbuildingâ. Commonly, you will specify a âbuildingâ because that is the prominent feature of the land.f you have recovered input tax on the basis of an intention to opt to tax and wish to retain the input tax recovered, you must make an option to tax at the very latest before any supplies of the land or buildings are made, and notify the option as detailed in paragraph 4.2.
Calculating the Deduction. You can claim tax deductions for the ongoing business use of your basement as well, in addition to any construction costs. These expenses are not 100 percent deductible, however. You must calculate what percentage of your home â not just your basement â is dedicated to your work or business.If your new office takes up 10 percent of the total square footage of your home, you can deduct 10 percent of the expenses of maintaining your home.onstruction Costs. If you've already got a basement, turning it into a home office is more a matter of remodeling than building. The costs of doing so are 100 percent deductible.