Portfolio Tracker

Read-Only Portfolio Sharing With a Tax Professional

By Deep Digital Ventures Editorial Team ·

Deep Digital Ventures publishes product education, research explainers, and data-driven articles related to its software tools. This article was prepared by our editorial team using the sources listed below and reviewed for factual accuracy before publication.

Last reviewed: 2026-04-23. Educational information only, not tax advice. Consult a qualified tax professional for your situation.

When a CPA, enrolled agent, or other tax preparer asks for portfolio detail, the safest answer is not “everything” and it is not a broker password. Share the records needed to reconcile taxable sales, dividends, interest, cost basis, holding periods, transfers, and unusual corporate actions. Keep trading authority, cash-movement authority, and private investment thesis notes out of the handoff.

Short Answer

Use a year-specific sharing packet first. Add broker-approved read-only access only when the preparer needs to inspect source records directly. A good packet answers three questions: what changed in the taxable account, what the broker reported to the IRS, and which items need human judgment before the return is prepared.

  • Share: broker tax forms, corrected forms, sales exports, income exports, lot and basis records, transfer logs, corporate-action notes, and a short question list.
  • Grant: inquiry, guest, or view-only access when the broker offers it and the preparer has a real need for live account records.
  • Avoid: shared passwords, trading permissions, money-movement permissions, full household account visibility, and notes that explain why you bought an investment rather than what tax record changed.
  • Revoke: remove access when the return, amendment, or planning project is complete, then save the access log with your year-end records.

The tax forms give the preparer the framework: Form 1099-B reports many broker sales, Form 1099-DIV reports dividends and distributions, Form 8949 supports sale-by-sale reconciliation, and Schedule D summarizes capital gain or loss.[1][2][3][4] The practical job is to make those forms match the records you actually know: lots acquired years ago, transferred positions, reinvested dividends, wash-sale flags, and corporate actions that may not be obvious from a single year-end value.

What To Share

A tax professional often needs more than a year-end account value. The useful review file usually includes realized gains and losses, dividends, interest, cost basis, holding periods, transfer history, wash-sale notes, and unusual events such as gifts, inherited lots, account transfers, stock splits, mergers, spinoffs, or return-of-capital adjustments. IRS Publication 550 covers investment income and disposition rules, while Publication 551 explains basis records.[5][6]

The cleanest read-only view maps portfolio facts to the forms your preparer is checking. Sales should be traceable from broker reporting to your own lot records. Income should be traceable by payer, account, date, and category. Transfers and corporate actions should have enough notes for someone else to understand why the broker record changed.

Dividend investors should not stop at a total-income number. A useful income export separates ordinary dividends, qualified dividends, capital gain distributions, foreign tax paid, exempt-interest dividends, and payer-level state information when available; those are the categories a preparer will look for when checking Form 1099-DIV reporting.[7]

Cost-basis review needs special care when older lots, transfers, or noncovered securities are involved. The IRS Instructions for Form 1099-B distinguish covered and noncovered securities, which means some older or transferred positions may leave more work for the investor’s own records.[8] Plain English: if the broker did not have to report basis to the IRS, your lot ledger matters more.

For federal review, build a six-part sharing packet as an organizing checklist, not as filing instructions.

  • Broker tax-form PDFs: the consolidated 1099 package, any corrected 1099 package, and the year-end statement, each labeled with broker name and tax year.
  • Sales export: each sale with symbol or CUSIP, account, date acquired, date sold, proceeds, cost or other basis, wash-sale amount if shown, and covered or noncovered status.
  • Lot ledger: acquisition dates, quantities, reinvested dividend lots, transferred lots, gifted or inherited flags if known, and the basis source for each lot.
  • Income export: dividends, interest, capital gain distributions, foreign tax paid, exempt interest, payer name, pay date, and account.
  • Transfer and corporate-action log: ACATS transfers, account consolidations, charitable transfers, stock splits, mergers, spinoffs, return-of-capital notes, and broker messages tied to those events.
  • Question log: one row for each item the preparer should inspect, such as “basis missing for transferred VTI lot,” “wash-sale amount appears only at broker,” or “foreign tax paid differs between tracker and 1099-DIV.”

A good sharing packet might say: 2025 Broker A consolidated 1099, corrected 1099 dated 2026-02-21, sales CSV, income CSV, lot ledger for transferred VTI and SCHD lots, and a three-row question log. That is much easier to review than a folder of screenshots plus a note that “the totals look wrong.”

What Access To Grant

Read-only access is the practical middle ground between emailing a pile of screenshots and handing over a broker password. The investor keeps control of the record, and the preparer can inspect transactions, income, lots, and supporting documents without placing trades, moving money, or changing cost-basis elections.

Major brokers use different labels for permission levels. Schwab, for example, describes View Only Authorization as access to account information without transaction authority, and its agreement lists tax information, positions, transactions, cost basis, gain and loss information, and historical documents among the information a viewer may access.[9][10]

MethodBest useMain risk
Read-only broker accessWhen the preparer needs to inspect source records, tax forms, lots, or account history directly.Too much account visibility if you do not limit accounts and revoke access afterward.
Sending PDFs and CSVsMost annual return reviews, especially when the question is limited to one taxable account or tax year.Files can become stale if corrected forms arrive later or exports omit basis and adjustment fields.
Sharing a passwordAvoid this. It is not a clean tax-sharing method.It may expose trading, money movement, profile settings, messages, and accountability problems if anything changes.

Broker statements are still a useful independent record. FINRA Rule 2231 generally requires account statements at least once each calendar quarter for customers whose accounts had a security position, money balance, or account activity during the period, subject to exceptions in the rule.[11]

  • Use broker-approved guest, inquiry, or view-only roles when the broker offers them; do not share your own login credentials.
  • Limit the accounts shown when the question is narrow, such as one taxable brokerage account with 2025 sales.
  • Send PDF tax forms and CSV exports through the preparer’s secure portal when live access is unnecessary.
  • Write down the access start date, access end date, account names, files shared, and the person who received them.
  • Remove access after the return, amended return, or planning engagement is complete.

What To Avoid

Keep private investment thesis notes out of this packet unless they explain a recordkeeping fact. “Bought for 20-year income plan” is rarely useful to a preparer; “shares transferred from taxable account to donor-advised fund on 2025-11-18” may be useful because it identifies an event, date, account, and security.

A bad sharing packet is a broker password, ten screenshots, a performance report, and a vague note that the numbers look different. Screenshots hide export fields, performance reports mix tax and investment return concepts, and shared credentials make it harder to prove who viewed or changed the account.

Also avoid sending a complete household account dump when the preparer only needs one taxable brokerage account for one tax year. Smaller, labeled records usually produce better questions and fewer follow-up messages.

Prepare Before Tax Season

Waiting until filing season turns small record gaps into urgent questions. A better pattern is to build the review packet before the broker tax forms arrive, then reconcile the official forms when they post.

Use this seven-step workflow for a taxable brokerage account review.

  1. In November or December, list every taxable account, broker, account registration, and date range that will be reviewed.
  2. Export all sales with description, date acquired, date sold, proceeds, basis, adjustment code, adjustment amount, and gain or loss; those are the fields your preparer will recognize from Form 8949 and Schedule D review.
  3. Run a wash-sale screen around loss sales. Publication 550 describes the 30-day-before and 30-day-after window for substantially identical stock or securities, so use a 61-day review window centered on the loss sale date.[5]
  4. Tag each dividend and distribution by payer, pay date, account, ordinary dividend amount, qualified dividend amount, capital gain distribution, foreign tax paid, and exempt-interest dividend when those fields are available from the broker or fund record.[7]
  5. Mark every noncovered or missing-basis lot for follow-up before the preparer starts the return; covered and noncovered reporting can differ, and basis records are needed to figure gain or loss on sale or other disposition.[6][8]
  6. Attach broker notices for transfers, mergers, spinoffs, stock splits, return-of-capital adjustments, and charitable transfers so the preparer can trace why the tracker and broker statement changed.
  7. After Form 1099-B and Form 1099-DIV arrive, compare broker totals to the tracker totals and send only the mismatch list to the preparer, not a vague note that “the numbers look different.”

Simple missing-basis scenario: you moved 27 shares of VTI from Broker A to Broker B in 2024, then sold 10 shares in 2025. Broker B may show proceeds but partial or missing basis. The packet should include the ACATS transfer notice, Broker A lot history, Broker B Form 1099-B, and a note asking the preparer to confirm the basis before filing.

Simple wash-sale scenario: you sold a fund at a loss on December 20, then bought a potentially substantially identical position inside the review window. The preparer does not need your market thesis; they need the sale, repurchase, account, date, amount, and any broker wash-sale adjustment.

If you use Deep Digital Ventures’ Portfolio Tracker, start the review from the tax-year transaction, income, lot, and note records, then attach the broker PDFs as source documents instead of treating screenshots as the record. Portfolio Tracker is a tracking tool, not a tax adviser; use it to collect records and questions, then let your tax professional decide the return treatment.

The output of the workflow should be a short question list: which sales need basis support, which income lines need payer-level review, which transfers need documents, and which accounts should be visible to the preparer. That is easier to review than a complete account dump.

When To Revoke Access

Read-only portfolio access is different from IRS authorization. Broker view-only access helps the preparer inspect portfolio records; IRS Tax Pro Account is used for powers of attorney, tax information authorizations, taxpayer information, and authorization management through IRS systems.[12]

Keep those channels separate: broker view-only access helps the preparer inspect portfolio records, Form 2848 or Form 8821 authorization handles IRS representative or information access, and tax software import permissions may allow a software provider to pull broker tax data.

The decision rule is simple enough to use tomorrow: grant the lowest permission level that lets the preparer answer the current question, share the smallest account set that covers the year under review, and keep a dated log of every file or read-only role you provided. When the filing, amendment, or planning project is complete, revoke the access and save the log with your year-end records.

FAQ

Do I need to give my tax professional my broker password? No. Use a broker-approved inquiry, guest, or view-only role when available, or send broker PDFs and CSV exports through the preparer’s secure portal. Password sharing makes it harder to prove who viewed or changed the account.

What if the broker Form 1099-B basis and my tracker basis disagree? Treat the difference as a reconciliation item, not as proof that either number is automatically correct. Ask the preparer to compare the broker Form 1099-B, your lot ledger, transfer records, and basis support before changing return inputs.[6]

Should retirement accounts be included? Include IRA or 401(k) portfolio detail only when the preparer asks for it. Publication 550 says its investment-income rules generally do not apply to investments held in IRAs, section 401(k) plans, and other qualified retirement plans, while distributions are handled under separate rules and forms.[5]

When should read-only access be removed? Remove it when the filing, amendment, or planning project is complete, unless there is a written reason to keep it open. Save the access log, the files shared, and the final question list with your year-end records.

Sources

  1. IRS, About Form 1099-B: https://www.irs.gov/forms-pubs/about-form-1099-b
  2. IRS, About Form 1099-DIV: https://www.irs.gov/Form1099DIV
  3. IRS, About Form 8949: https://www.irs.gov/forms-pubs/about-form-8949
  4. IRS, About Schedule D (Form 1040): https://www.irs.gov/forms-pubs/about-schedule-d-form-1040
  5. IRS Publication 550, Investment Income and Expenses: https://www.irs.gov/publications/p550
  6. IRS Publication 551, Basis of Assets: https://www.irs.gov/publications/p551
  7. IRS Instructions for Form 1099-DIV: https://www.irs.gov/instructions/i1099div
  8. IRS Instructions for Form 1099-B: https://www.irs.gov/instructions/i1099b
  9. Schwab, Add an Authorized Viewer to Your Account: https://www.schwab.com/resource/add-an-authorized-viewer-to-your-account
  10. Schwab, View Only Authorization Agreement: https://www.schwab.com/secure/file/P-8006652
  11. FINRA Rule 2231, Customer Account Statements: https://www.finra.org/rules-guidance/rulebooks/finra-rules/2231
  12. IRS Tax Pro Account: https://www.irs.gov/tax-professionals/tax-pro-account