I had a small stock sale in a private company for which a 1099-B was issued with Box 12 checked (cost basis not reported to IRS) and the acquired dates were "Various." Turbotax notated "see attached statement" next to the brokerage name, but didn't prompt me to print/file a Form 8453 with any attachment when I e-filed or place instructions to do so in my return cover sheet. Looking back, a Form 8453 is within my return forms but totally blank.
1. Is it correct that in this circumstance I should do so? I am still within the 3 day filing window.
2. The documents supporting the cost basis and acquisition dates are from the company, and as such the figures match the 1099-B but the institution name does NOT match the 1099-B, which was really a financial conduit for the transaction. Should I attach a written explanation as well, or will simply attaching the cost basis paperwork with matching cost/proceeds figures suffice?
Thank you.
