TurboTax is asking me for the cost basis that my 1099-B lists as Not Available with the footnote that these were for proceeds from collectible securities, Line 12. These sales of SPDR GOLD TRUST were included under a section labeled "OTHER TRANSACTION - Cost basis not reported to IRS - Form 8949, (X)". When I look up the cost basis in old statements, I find numbers that don't seem to make sense in that the value of the holdings when acquired and when sold would be thousands of times the proceeds shown in box 1d. I am afraid if I enter those high numbers are incorrect and make it look like I lost $50k that I did not actually lose. (I would have noticed.) Note that the same holding is also shown as being sold under the Short Term and Long Term Capital Gains & Loses sections but with a cost basis and proceeds that appear to be reasonable. So what are "collectible securities" under "Other Transactions", and what should I simply enter zeros for the cost basis to malify TurboTax?
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