I don't think you really 'do' anything with it, at least not right now.
It remains suspended until you sell the home, in case you use it again for a home office. So just keep a permanent note to yourself of that amount, in case you need to know about it in the future. As a side note, that amount seems large for three years of depreciation of a home office (unless your office was a very large portion of your home, or your home is a multi-million dollar home), so you may want to double check that is the correct amount.
