topic Long 1099B with basis not reported for one sale in Get your taxes done using TurboTax

Long 1099B with basis not reported for one sale

propower888 — Tue, 24 Feb 2026 18:43:39 GMT

I have a long 1099B form with 50 short term and 100 long-term transactions. There is one short term transaction with basis, not reported to the IRS. Last year, I simply summarize them all, but there were no transactions that weren't reported. Can I do a similar thing this year? And somehow add in this transaction by itself or do I need to list every transaction now?

Re: Long 1099B with basis not reported for one sale

ReneV4 — Tue, 24 Feb 2026 19:02:00 GMT

Yes. You can still summarize and list the short-term transaction with basis not reported to the IRS in its own category.

Based on what you wrote, your summary would look like this:

Short-Term Covered: (Box A) Basis was reported to the IRS
Short-Term Non-Covered: (Box B) Basis was NOT reported to the IRS
Long-Term Covered: (Box D) Basis was reported to the IRS

When you are inputting your stock transactions, look for short-term basis not report to IRS (noncovered) for your third category.

Re: Long 1099B with basis not reported for one sale

propower888 — Tue, 24 Feb 2026 19:42:06 GMT

When I go to enter my data, the first question it asks is if I want to report the summary or if I want to report the individual transactions. If I choose summary, the program only lets me enter summary data, not individual data. So I don't see any way to enter this one transaction unless I start a new 1099B. what am I missing?

PS - and if I add in the summary for the single transaction, then TurboTax says I have to mail in my 1099 with my tax return. Poking around on the Internet it seems that if I instead listed every transaction individually, I wouldn't have to do this. I don't wanna have to do that but if it's a way to go, please let me know.

Re: Long 1099B with basis not reported for one sale

DavidD66 — Tue, 24 Feb 2026 21:25:07 GMT

You can either enter it as if it was a separate Form 1099-B, or you can enter the single transaction as a summary total for the category of Short-Term Non-Covered. After all, that is the total for that category. Either way is acceptable.