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Level 4
March 7, 2026
Solved

Client has a 1099-B which is 293 pages .

  • March 7, 2026
  • 3 replies
  • 24 views

Client gave me a 1099-B that is 293 pages, I know from past experience that the attachment will be way to big to email. How is the best way to handle this, use form 8949 and just put the totals in, then mail the the 1099-B, just put the totals in and don't mail the 1099-B, and wait to see if they request a copy, or just send in a paper return. All opinions are welcome as along as they aren't condescending. 

 Thank you in advance. 

Best answer by GodFather

As IRonMaN asks...there should be an indication as to whether the basis was reported or not.  If it was reported, there is no need to send/attach the 1099B.  If there are sales that are not reported and you choose not to list each transaction separately but combine them...then you may need to attach a copy of those transactions.  

With that said, I've never done that and I've never been questioned.  Not suggesting that is the right approach, just letting you know my experience.  

3 replies

IRonMaN
Level 15
March 7, 2026

The 1099B says basis is or isn't reported to the IRS?

Slava Ukraini!
GodFather
GodFatherIntuit Community ChampionAnswer
Intuit Community Champion
March 7, 2026

As IRonMaN asks...there should be an indication as to whether the basis was reported or not.  If it was reported, there is no need to send/attach the 1099B.  If there are sales that are not reported and you choose not to list each transaction separately but combine them...then you may need to attach a copy of those transactions.  

With that said, I've never done that and I've never been questioned.  Not suggesting that is the right approach, just letting you know my experience.  

Just-Lisa-Now-
Intuit Community Champion
March 7, 2026

Ive never mailed or attached any 1099B forms. 

As long as your gross proceeds match IRS records, you'll never hear a peep from anyone.

♪♫•*¨*•.¸¸♥Lisa♥¸¸.•*¨*•♫♪
BobKamman
Level 15
March 7, 2026

You only use the 8949 for "uncovered" transactions.  Or maybe wash sales, and there may be many for a day trader like yours.  I just adjust the cost basis for wash sales and include them with the "covered," and IRS never asks.  

Just-Lisa-Now-
Intuit Community Champion
March 7, 2026

I do the same as Bob.

♪♫•*¨*•.¸¸♥Lisa♥¸¸.•*¨*•♫♪
BobKamman
Level 15
March 7, 2026

@Just-Lisa-Now- And I charge a higher fee for clients with wash sales.  To figure out whether to add or subtract the amount, I have to stop and think.  I don't have time for that during tax season.