Not a CPA but my interpretation of 8453 is they want the details that would be on 8949 or "statement with equivalent information" and since 8949 makes no distinction between brokers/accounts/1099s I would think you only need to send in one 8453, and only the pages from the 1099Bs with the missing details - and from what you describe these are the noncovered categories which are usually presented in 1099Bs with their own section/totals etc.
Personally I suspect it doesn't matter and they ignore this below a certain threshold, and you'll never hear about this again. TT generally encourages everything to be jammed in as sales summaries with adjustments and then mail the IRS so they are probably flooded with these 8453s from TT users. In future if you don't have huge amount of adjustments (wash sales, AMD) or noncovered sales, then putting them in as "one by one" with the details on 8949 electronically avoids this mailing step.
