But like any system, it needs upkeep and maintenance.

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So while you may not pay upfront now, the expenses for the software maintenance and upkeep may accumulate and charge you in the future.

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That includes such diverse items as civilian pay, ship maintenance, facilities upkeep, professional training and jet fuel.

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If you rent a home out for more than two weeks a year, it becomes a rental for tax purposes, and you can deduct costs for upkeep, such as repairs, utilities and condo maintenance fees.

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