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@caryld65 wrote:

given to land trust. 

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What does "given to land trust" mean?  Is the land being "given" to the town?  Or does the taxpayer still own it, but is just not allowed to build on it?

If the taxpayer still owns it, he can deduct the property taxes he pays on the land.  Otherwise, it is just an asset that is owned that may have a gain or loss when sold.  Nothing else you could do with it on the tax return.