Get your taxes done using TurboTax

1)"the fair market value" would be the price I bought it for? likewhatever it said on the receipt? the price I bought it for before taxes or after taxes?

 

2)how do I calculate the deductions. if I use it for 12 hours a day per work day.

if I gave you an example can you break it down please?

 laptop costed : $1,6000 and like $1800 after taxes (bought a few years ago)

and I've been using it for my job I work 3 days a week. 12 hours per day sometimes 8 hours. 

how much do I deduct for my taxes. in dollars