A new income source not on last year's return is invisible to any checklist built from that return, because nothing last year points to it. The way to catch it is to ask every client the same short set of yes or no questions about the year, and to add a document line for each yes before chasing anything else.
Why a prior-year checklist misses a new income source
A prior-year checklist misses a new income source because it is a copy of what happened last year. Every line traces back to a form that arrived once. A job started in August, an account opened in March, or a first payment from a client in the new side business has no prior line, so nothing prompts for it.
The prior-year method is still the right base. Most of a household's documents repeat, and the post on using the prior year return as a checklist covers building that base line by line. The blind spot is structural, not a flaw in how the list was written. A perfect copy of last year is still last year.
The gap shows up in three ways:
- Missing forms that never get chased. A W-2 from a second employer is not on the list, so its absence raises no flag.
- Short totals that look normal. If the client changed jobs mid-year and only the first employer's W-2 arrives, wages may look close enough to last year to pass a glance.
- Forms that arrive unannounced. A 1099 from a payer nobody expected lands in the folder with no line to match, and it can sit unread.
Document-matching software has the same limit. Schema CPA, for example, flags a form that came in last year and has not arrived this year, as the client tracker demo shows. It cannot flag a form it had no reason to expect. An unexpected form that does arrive is still read and classified, but only a question to the client reveals one that never comes.
Which life events usually bring a new income source?
Life events that usually bring a new income source are the ones that change where money comes from: a new or second job, a first investment or crypto account, buying or renting out property, freelance or gig work, selling a home, an inheritance, and unemployment benefits. Each tends to produce a form, or records the client must keep.
Job changes. A new employer means a new W-2, and a mid-year switch means two. A client who took a second part-time job may not think of it as worth mentioning.
A first brokerage or crypto account. A new brokerage account can produce a 1099-DIV and a 1099-B. The IRS digital assets page says brokers report gross proceeds on Form 1099-DA for transactions on or after January 1, 2025, and cost basis for certain transactions on or after January 1, 2026. A client who started trading on an app may get a form they have never seen.
Rental property. Buying a rental or renting out a room or a former home starts a Schedule E block: rent records, expenses, and a 1098 if there is a mortgage.
Side work. Freelance and gig income may or may not come with a form. The IRS Instructions for Forms 1099-MISC and 1099-NEC say Form 1099-NEC box 1a covers nonemployee compensation of $2,000 or more for tax years beginning after 2025. The IRS page Understanding your Form 1099-K describes reporting by payment apps and platforms for payments over $20,000 in more than 200 transactions. Below those lines, the income still exists, but the client's own records are the only document.
An inheritance. The IRS Instructions for Form 1041 say Schedule K-1 (Form 1041) notifies beneficiaries of the amounts to include on their returns. The Instructions for Forms 1099-R use distribution code 4 for certain payments to beneficiaries, such as death benefits paid to a survivor beneficiary.
Government payments. The IRS page about Form 1099-G lists unemployment compensation among the payments that form reports.
Questions that surface a new income source in the organizer
The questions that surface a new income source are short yes or no questions asked every year, whether or not anything seems to have changed. Each yes adds one or more document lines. Asking every client the same set keeps the list from depending on what the client happens to remember.
Ask them in the organizer or with the prior-year list, before any reminder goes out. A client answers faster when each question is about an event, not a form. "Did you sell any property?" gets an answer. "Did you receive a Form 1099-S?" gets a shrug.
Eight questions and the document each one reveals
Example wording. Adapt the questions to the firm's own organizer.
| Question to ask every client | New document it would reveal |
|---|---|
| Did anyone in the household start a new job or work for more than one employer? | A W-2 from each new employer |
| Did you do any freelance, gig or side work, or get paid through an app? | 1099-NEC, 1099-K, or the client's own income records |
| Did you open a new bank, savings, CD or brokerage account? | 1099-INT, 1099-DIV or 1099-B from the new institution |
| Did you buy, sell or trade any cryptocurrency or other digital assets? | Form 1099-DA from the platform, plus the client's transaction history |
| Did you buy a property, or start renting out all or part of one? | Closing statement, 1098, rent and expense records |
| Did you sell a home, land or other real estate? | Form 1099-S and the closing statement |
| Did you inherit money, an account or property, or receive anything from an estate or trust? | Schedule K-1 (Form 1041) or a 1099-R from the inherited account |
| Did anyone receive unemployment benefits or other government payments? | Form 1099-G |
Follow each yes with one detail question: who paid, and roughly when. "Yes, I started a job" becomes "a W-2 from Example Logistics, started in August", which is a line that can be matched when the form arrives.
Keep the questions identical from year to year. A client who answered no to all eight last year can do it again in a minute. A client who answers yes to one has just told the firm about a document no checklist would have caught. The tax document checklists category covers how these questions sit alongside a checklist by client type.
Some new sources are not income but records the client keeps, such as childcare receipts or estimated payment confirmations. The post on documents clients forget to send covers prompts for those.
Edge case: a closed account still expected on the checklist
A closed account still expected on the checklist is the reverse problem: a line from last year that no longer applies. If nobody retires it, the firm keeps chasing a form that may never come, and the client gets reminders for an account closed in spring. The fix is to confirm the closure and close the line with a note.
Confirm with the client, in writing, before closing a line. A short question works: "Our list shows a savings account at Example Online Savings Bank ending 7730. Is it still open?" Clients sometimes think an account closed when it only went dormant, or confuse two accounts at the same bank.
Then decide whether a final form is still due. An account that closed during the year may still produce a form for the months it was open, which the next section covers. Until that is settled, change the line's status to something like "closed in May; final form possible" rather than deleting it.
Record the reason when the line closes. A note such as "Account closed May 14, 2026; client confirmed; interest under form threshold, no 1099 expected" saves next year's preparer from asking the same question. It also stops the line from being copied forward again.
The same edge case covers more than bank accounts. A mortgage paid off, a job left in January, a partnership interest sold, or a rental sold each removes lines. The status model for tracking missing client documents, including a "not applicable this year" status, is set out in the received, missing and duplicate status for each document.
What does a final-year form from a closed account look like?
A final-year form from a closed account looks like any other form from that issuer, covering only the months the account was open. A savings account closed in May can still produce a 1099-INT for interest earned January through May. A mortgage paid off in June can still produce a 1098 for interest received that year.
Whether the form arrives depends on the issuer's reporting threshold, not on whether the account is open now:
- Interest. The IRS Instructions for Form 1099-INT say the form is filed for interest of at least $10. A closed account that earned $40 before closing should still produce one. One that earned $6 may not.
- Mortgage interest. The IRS Instructions for Form 1098 say lenders file for $600 or more of mortgage interest received during the year, and that the threshold applies separately to each mortgage. A refinance can therefore produce two 1098s: one from the old lender for the months before payoff, and one from the new lender.
- Brokerage accounts. An account emptied by a transfer to another broker may still produce a 1099 from the old broker for dividends and sales before the transfer.
Timing usually follows the normal calendar. The IRS General Instructions for Certain Information Returns list January 31 as the recipient due date for Forms 1098, 1099-INT and 1099-DIV, and move a due date that falls on a weekend to the next business day. For tax year 2025 forms, that made the date February 2, 2026. A final-year form from a closed account is not sent earlier just because the account closed.
The final form can surprise clients. Many assume a closed account sends nothing. If the client discards it as junk mail, the line stays missing. Telling the client to watch for one last form from the old institution saves a reminder later.
When the final form arrives, match it and close the line. When the year's forms have all come in and it has not, check the amount: if the interest was below the threshold, the client's last statement may be the only record, and a short note in the file explains why there is no form. If documents are still missing at that point, the post on missing tax documents covers the options before filing.