IreneS
Intuit Alumni

After you file

I've added some information on capital gains and disposing of the asset to my answers.  TurboTax will walk you through the calculation.  

If you want just a rough calculation of cap gain for purposes of the extension, subtract the cost of the property from the sales price.  This will overestimate the gain, but it will give you some idea of how to calculate the tax payment for the extension.
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