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Templates Β· Accounting

Onboarding Templates for Accounting Firms and Tax Practices

Tax document checklists, engagement letters, client intake questionnaires, and welcome packets designed for the scale and compliance needs of accounting firms.

Accounting firm onboarding is defined by two realities: the document list is long and specific, and a meaningful chunk of the work happens once a year under deadline pressure. Generic intake forms are not enough. Every template in this section is tuned for the compliance reality of a tax season or monthly close engagement. Use them as a starting point, customize for your jurisdiction and service line, and plug them into a portal that remembers everything from last year.

Who this is for
  • Tax practices onboarding individual and business clients
  • Accounting firms with a monthly-close or advisory practice
  • Anyone who has ever chased a missing W-9 at 11pm on April 14

Key things to know

Separate tax and advisory onboarding
They are different engagements. Do not try to collect both sets of documents on the same intake form.
Roll document lists year over year
Returning clients should see last year’s document list as a starting point, not a blank page. This alone saves hours per client.
Build in engagement-letter signature
The engagement letter is a hard prerequisite. Lock the rest of the onboarding behind it so no work starts on an unsigned engagement.

Quick answers

What documents should accountants request during client onboarding?
The baseline list includes W-9 or tax ID, prior two years of returns, prior year financials, bank and credit card statements, chart of accounts export, software access (QuickBooks, Xero), and a signed engagement letter. Business clients add payroll records, fixed asset schedules, and entity formation docs. Industry-specific needs layer on top.
Do you have an onboarding template for bookkeepers specifically?
Yes. The bookkeeping template focuses on monthly-close engagements: bank feed setup, chart of accounts cleanup, class and location tracking, prior period reconciliations, and recurring transaction rules. See the Bookkeepers template library for the complete pack.
How do I onboard tax clients during the busy season?
Front-load the document request the moment the engagement letter is signed. Use a portal with named upload requests and automatic reminders, so you are not manually chasing W-2s on April 10. Firms that automate the reminder layer during tax season save 8-12 hours per week.

Related sections

Photo by OnboardMap

This Is What Your Bookkeeping Clients Should See on Day One (Live Portal Demo, No Signup)

Most bookkeepers send a welcome email with a doc list buried in a PDF, then chase clients for two weeks. This article shows you the alternative, live in the page below: a single branded portal where your client sees a clear checklist, current step, and progress bar. Click any task to expand. Tap the checkboxes to mark steps done. The progress bar updates as you go. Then read the breakdown of the 5 items every great tax-season intake includes, why each one matters, and how to clone this exact template into your own firm in 10 minutes. No signup to view the demo.

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