Short answer: You stop chasing clients for documents by making the chase specific and automatic. Build each client's list of expected documents from last year's return, let AI read and sort whatever they upload, tick items off as they arrive, and send reminders that name the exact missing item. Staff then call only the clients who are genuinely stuck, instead of emailing everyone the same generic nudge.
The problem
Every accounting and tax practice knows the pattern. Engagement letters go out, organisers or checklists follow, and then the slow drip begins. A W-2 arrives in January, a brokerage statement in March, a K-1 in September. Some clients upload a phone photo of the wrong year's form. Others reply "all sent" when half the list is missing.
Practitioners describe it plainly. In an April 2026 thread on the Intuit Accountants Community, preparers listed the tasks that still need the most manual follow-up: requesting missing documents, answering client questions and tying each response to the right return. One reply pointed out that even when only totals need entering, clients with several 1099s mean opening PDF after PDF to find the figures.
In an August 2026 thread, a small CPA firm asked whether its tax software could handle document requests, reminders and status tracking without adding a separate practice management tool. A solo practitioner with about 125 clients replied that basic checklists and early-season reminders were possible, but automatic reminders for outstanding documents probably were not, so they run other tools alongside.
The late cases are the expensive ones. Intuit's Tax Pro Center collected extension season stories from practitioners in October 2026: a client who marked several accounts "N/A" on an organiser and turned out to have the forms after all, financial statements promised for months that arrived in September full of errors, and books from an outside firm delivered just before the deadline.
What it costs
There is little neutral data on this, so treat the following as one indication. Progress Software, which makes the ShareFile client portal, surveyed 355 firms across accounting, legal, financial services and other sectors for its State of Client Engagement 2026 report. As reported by Dynamic Business, firms said they spend close to 20 hours a week collecting documents and signatures and chasing clients, a median loss of roughly US$60,000 a year in nonbillable time. Nearly 70% said at least one in ten quarterly engagements is delayed by missing information. It is a vendor survey, so check it against your own timesheets.
Why it keeps happening
Many documents do not exist yet
Clients cannot send what they have not received. For the 2025 tax year, the IRS set 17 February 2026 as the date brokers had to furnish Forms 1099-B, 1099-S and 1099-DA, including consolidated statements. A firm that asks for "everything" in January is guaranteed a second and third round of emails, because part of the pack is not available until later.
Generic requests get generic replies
A 40-item checklist that covers every possible situation is easy to ignore. The client cannot tell which items apply to them, so they send what they have and stop. The firm then has to work out what is missing, which means opening every upload and comparing it with last year's file by hand.
The UK chase is now quarterly
Making Tax Digital for Income Tax changed the rhythm for UK practices. According to GOV.UK, sole traders and landlords with qualifying income over £50,000 had to start from 6 April 2026, with the threshold falling to £30,000 from April 2027 and £20,000 from April 2028. HMRC said in July 2026 that more than 864,000 people are in scope.
Each of them now sends quarterly updates of income and expense totals, due on 7 August, 7 November, 7 February and 7 May. HMRC is not issuing penalty points for late quarterly updates in 2026 to 2027, but from the second year each missed deadline earns a point, and four points bring a £200 penalty. For a practice that files these on clients' behalf, the once-a-year scramble for records has become a four-times-a-year one.
Status lives in someone's head
Who has sent what is often tracked in inboxes, a spreadsheet or a status field in the tax software. When the person who knows is on holiday or buried in returns, follow-ups simply stop.
How AI solves it
Most of this is ordinary automation: lists, dates and reminders. AI earns its place in three spots. It reads last year's file to work out what to ask for, it reads and sorts what clients send back, and it writes reminders specific enough to get a response.
The workflow, step by step
- Build the expected list. For each returning client, pull last year's return or workpapers and list the documents that produced it: each employer, each bank and broker, each property, each pension. A language model can read a prior-year return and draft this list; rules then add anything your firm always asks for. Intuit describes a similar approach in its own organisers, using prior-year data to tailor the questions and document list.
- Send one clear request. The client receives a short, personal list ("Your W-2 from your employer, the consolidated 1099 from your brokerage, your mortgage interest statement") with a single upload link. Items that will not exist until later get an expected date.
- Read and sort every upload. A document model classifies each file and extracts the key fields. For US forms, Microsoft's prebuilt tax document models cover W-2s, 1098s, most 1099 variants and the 1040, and its unified model can pick those forms out of a mixed bundle. For UK records such as P60s, bank statements or rental statements, a custom classifier or a vision-capable language model does the sorting.
- Check and tick off. Rules compare what arrived with the expected list: right client, right tax year, right payer. A 2024 form uploaded for 2025 is flagged at once, while the client is still engaged, instead of in March when someone opens the file.
- Spot the surprises. A new payer that was not on last year's list (a new broker, a new employer) is raised for a person to review, because it often means more documents are coming.
- Remind with specifics. Rules decide when to remind and when to escalate. A language model drafts the message, naming the exact item still outstanding and where the client usually finds it. Reminders stop the moment the item arrives.
- Answer the simple questions. "Do you need my HSA form?" can be answered from the client's own list and your firm's guidance. Anything that is really tax advice goes to a preparer.
- Show status in one place. A dashboard shows every client as complete, waiting on a known item, or stuck. Staff phone only the stuck ones.
Where to use AI and where to use rules
| Task | Best tool | Why |
|---|---|---|
| Drafting the expected document list from last year's return | Language model, reviewed by a person | Returns and workpapers vary; a person confirms the list once |
| Sending requests and reminders on schedule | Rules and your portal or email tool | Timing must be predictable and auditable |
| Classifying uploads and extracting fields | Document model or vision model | Clients send scans, photos and mixed PDFs |
| Checking tax year, payer and client name | Rules | Simple comparisons that must be exact |
| Writing a reminder that names the missing item | Language model | Specific messages get answered; template wording is ignored |
| Deciding a client is "complete" and ready to prepare | Person, helped by the checklist | Judgement on what is material |
Costs and timeline
The figures below are estimates built on stated assumptions. Swap in your own numbers.
Assumptions: a practice with 400 individual tax clients, an average of eight documents each, three follow-up rounds per client, 10 minutes per follow-up (checking what is missing, writing, logging) and 2 minutes to open and file each upload, at a fully loaded staff cost of $40 (about £30) an hour.
Follow-ups come to about 200 hours a season (400 × 3 × 10 minutes) and filing uploads to about 107 hours (400 × 8 × 2 minutes). That is roughly 300 hours, or about $12,000 of staff time, before any preparation starts. If automation removed two thirds of it, the saving would be around 200 hours a season, assuming the clients who need a phone call still get one.
| Option | What it involves | Best for |
|---|---|---|
| Do nothing | Keep emailing checklists and chasing by hand. No new cost; the hours above stay | Very small practices with a stable, organised client base |
| Use your practice management or tax software | Turn on portals, organisers and automatic reminders in tools you may already pay for (many practice management suites and tax packages include them) | Most practices; start here |
| Custom or hybrid build | Add AI reading, prior-year list building and specific reminders around your existing portal and tax software. Model usage for 3,200 documents a season is likely to cost tens to low hundreds of dollars, assuming a few cents per document | Firms with mixed client types, UK and US work, or tools that do not talk to each other |
Timeline (estimate): a first version covering expected lists, upload classification, tick-off and reminders for one client segment usually takes four to six weeks. Pilot it with 30 to 50 clients for one deadline, such as a quarterly update, and compare its "missing" flags with what your team finds before rolling it out.
When not to use AI
- Your software already does most of it. If your portal sends automatic reminders against a per-client checklist, configure that properly before building anything.
- The client has no records. No model can produce bookkeeping that was never done. Several of the extension stories above needed months of reconstruction by a person.
- The real problem is policy. Engagement letters with a firm cut-off date and a late-information fee change behaviour in a way reminders cannot.
- You have not checked the data rules. Tax documents are sensitive personal data. In the US, review the Section 7216 rules on using and disclosing return information; in the UK and EU, check your GDPR obligations and each provider's data processing terms before any document goes to a model.
- Volume is low. With 60 clients, a well-kept spreadsheet and a disciplined fortnightly call list may be all you need.
How to start
- [ ] Count last season's follow-ups: how many emails and calls per client, and who sent them.
- [ ] List the ten documents that arrive latest and note when each is actually issued.
- [ ] Check what your current portal and tax software can already do with reminders and checklists.
- [ ] Pick one segment (for example, MTD quarterly clients or US clients with brokerage accounts) for a pilot.
- [ ] Write down when a client counts as "complete" and who decides.
- [ ] Agree your data protection position before any client file is processed by a model.
If you want help building the reading, checking and reminder steps around your existing tools, our AI workflow automation service covers intelligent document processing and integrations. If you are still deciding between your current software, a new platform and a custom layer, AI strategy consulting ends in a working prototype tested on your own client files. The same chase-and-check pattern appears in how to automate COI tracking for subcontractors and vendors, and finance teams may also find how to automate cash application useful.
FAQ
How do I get clients to send their tax documents on time?
Send a short, personal list built from last year's return instead of a long generic checklist, with one upload link and expected dates for documents that arrive later. Back it with automatic reminders that name the missing item, and set a cut-off date and late-information fee in your engagement letter.
Can AI chase clients for missing documents?
Yes, with limits. AI can work out what each client should send, read and sort the uploads, and draft specific reminders, while rules handle the timing. A person should still confirm the expected list, decide when a file is complete and make the phone calls to clients who are stuck.
What is the best software for collecting client documents?
Start with what you have. Many practice management suites and tax packages include portals, organisers and automatic reminders. A custom AI layer makes sense when those tools cannot read messy uploads, do not talk to each other, or cannot build per-client lists from prior-year data.
How does Making Tax Digital change document collection for accountants?
Clients in scope send quarterly updates of income and expense totals, due on 7 August, 7 November, 7 February and 7 May. Practices that file these need records four times a year instead of once. Penalty points for late updates do not apply in 2026 to 2027 but start from the second year.
Is it safe to use AI on client tax documents?
It can be, if you control where the data goes. Use providers with data processing agreements that do not train on your data, keep access logged, and check your obligations under GDPR in the UK and EU or Section 7216 in the US before processing any return information.
Why do clients send tax documents late?
Partly because some documents do not exist yet: US brokers had until 17 February 2026 to issue 2025 consolidated 1099 statements. The rest is usually unclear requests. When a client cannot tell which items apply to them, they send what they have and stop.
Sources
- Intuit Accountants Community, "What still has too much manual follow-up in your tax workflow today?" (April 2026): https://accountants.intuit.com/community/practice-advice-17/what-still-has-too-much-manual-follow-up-in-your-tax-workflow-today-5852
- Intuit Accountants Community, "Can Lacerte/Intuit handle client document requests, reminders, workflow tracking...?" (August 2026): https://accountants.intuit.com/community/lacerte-product-discussions-2/can-lacerte-intuit-handle-client-document-requests-reminders-workflow-tracking-e-signatures-payments-and-scheduling-without-needing-separate-practice-management-software-like-taxdome-or-canopy-96576
- Intuit Tax Pro Center, "Boo! Extension season horror stories" (October 2026): https://accountants.intuit.com/taxprocenter/tax-law-and-news/boo-extension-season-horror-stories/
- Intuit Tax Pro Center, "Putting the AI into tax organizers" (December 2025): https://accountants.intuit.com/taxprocenter/practice-management/putting-the-ai-into-tax-organizers/
- Dynamic Business, "Firms are bleeding $84K a year to chasing paperwork" (August 2026): https://dynamicbusiness.com/topics/news/firms-are-bleeding-84k-a-year-to-chasing-paperwork.html
- IRS, 2025 General Instructions for Certain Information Returns: https://www.irs.gov/instructions/i1099gi
- IRS, Section 7216 Information Center: https://www.irs.gov/tax-professionals/section-7216-information-center
- GOV.UK, Check if you're eligible for Making Tax Digital for Income Tax: https://www.gov.uk/guidance/check-if-youre-eligible-for-making-tax-digital-for-income-tax
- GOV.UK, Send quarterly updates (Making Tax Digital for Income Tax): https://www.gov.uk/guidance/use-making-tax-digital-for-income-tax/send-quarterly-updates
- HMRC press release, "Deadline approaches for first Making Tax Digital quarterly update" (July 2026): https://www.mynewsdesk.com/uk/hm-revenue-customs-hmrc/pressreleases/deadline-approaches-for-first-making-tax-digital-quarterly-update-3459169
- Microsoft Learn, "Document Intelligence US tax documents data extraction": https://learn.microsoft.com/en-us/azure/ai-services/document-intelligence/prebuilt/tax-document
If you would like to talk through your own document collection process and whether automating it is worth it, get in touch at https://sintraflow.com/contact.
