so what about the tax returns for 2013-2019, the IRS has transcripts for the last 7 years? How did you do your taxes for the last 15 years? if you used TT, again only the last 7 years would be available, but the cost basis and depreciation history might be contained in one of them. if for some reason no records are available consult a tax pro. you could have other tax issues that would need to be addressed.
