Pro tips for summarizing stock transactions from Form 1099-B

Your client Lulu drops off a consolidated brokerage statement showing pages and pages of stock sales and dividend activity. The statement includes both covered and noncovered securities. Several transactions include wash-sale adjustments. Lulu wants to know whether all those pages mean a much larger tax prep bill for her, so you need to determine whether every sale must be entered separately or whether you can report summary totals.

The following questions came from tax professionals working with these exact issues in practice.

1. When reporting the sale of securities, can I enter the summary totals for covered/uncovered short- and long-term transactions, or must I list each individual transaction?

It depends on the type of transaction.

If the taxpayer received a Form 1099-B, Proceeds from Broker and Barter Exchange Transactions, indicating basis was reported to the IRS and there are no adjustments, you can include the aggregate amounts on Schedule D (Form 1040), Capital Gains and Losses. Use Line 1a for short-term transactions and Line 8a for long-term transactions.

Another exception to reporting each individual transaction separately on Schedule D is to attach a statement with all the details. On Form 8949, Sales and other Dispositions of Capital Assets, include the combined totals in Parts I or II from all the attachments. This is broken out based on the checkbox selected as well. If the taxpayer has statements from multiple brokers, report each broker on a separate row.

2. If a client has numerous transactions and wash sales on their Form 1099-B, is it acceptable to enter “see attached” with the broker’s name and a date like “12/31/YY”?

Yes. On Form 8949, simply note "Various," “see attached (broker name)” for description and dates, and enter the totals. Use "Various" for dates, as it’s clearer. When using this method, you still need to enter Code W in Column (f) and the total disallowed losses as a positive number in Column (g).

3. Does summarizing mean I can combine short-term transactions with other short-term transactions and long-term transactions with other long-term transactions?

Yes. Summarizing lets you combine multiple transactions into one line, as long as they’re in the same category.

Short-term transactions must be combined with other short-term transactions, and long-term transactions must be combined with other long-term transactions. You cannot combine short-term transactions with long-term transactions.

4. Doesn’t “covered” mean the basis is already reported to the IRS?

Yes. Covered means the broker reports the cost basis to the IRS, while noncovered means they don’t.

5. Can I separate wash-sale transactions from non-wash-sale transactions for the same security, or should I just report a single summary?

Yes, you can separate them. But typically, it’s easier to summarize everything in one total and attach the broker statement. That way, the wash-sale adjustments are reflected in the attached detail, avoiding the need for separate partial summaries.

Working with consolidated 1099s often means balancing careful review with efficient data entry. As these real-world questions show, many tax professionals are navigating the same reporting choices on Form 8949 and Schedule D.

To keep building confidence with complex reporting scenarios, explore upcoming NATP education, including webinars, courses and more at https://www.natptax.com/events-education/.