What if cost or adjusted basis is "missing" from 1099-B form? Should I leave it blank? (2024)

In my case, my broker (Fidelity) provided me with Form 1099B with box 1e (Cost or Other Bases) with a non-zero value, but with a letter "(e)" suffixed to the value.

When TurboTax imported this data from my broker, it recorded with no value filled in for the "Cost or Other Basis" in its Form 1099B, and in the "Quick Entry Table" for Form 1099B (in TurboTax Premier)

1. "Basis Reported to IRS" set to "No", ==> This may be the reason TurboTax left it blank

2. "Reported on Form 1099B" set to "Yes" ==> So it seems IRS may have this value

My broker also provided "Supplemental Information" with "Adjusted Cost or Other Basis" for those sales with a bigger value than what they had in their 1099B.

So, in this case,

A. should I put any value other than zero in TurboTax's 1099B form for these sales?

B. If so, which of the two values should I put?

b.1. the value in box 1e in broker-provided 1099B, OR

b.2 the value in "Adjusted Cost or Other Basis" box in broker-provided "Supplemental Information"

C. If I put zero (or leave it as empty), or the value in above b.1 (i.e., non-adjusted cost basis) in to the TurboTax's 1099B, where can/should I correct (or adjust) the basis? It seems like I can do that through the "Quick EntryTable" for Form 1099B in TurboTax (Premier)? Is that the right place to make the adjustment?

What if cost or adjusted basis is "missing" from 1099-B form? Should I leave it blank? (2024)
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