How to Prepare for Tax Season — Complete Practitioner Checklist
The Tax Season Preparation Timeline
| Timeline | Action | Priority | Notes |
|---|---|---|---|
| October–November | Review prior year capacity; plan staffing; order supplies | High | Hire seasonal staff now — good staff is gone by December |
| November–December | Update software; test e-file systems; review fee schedule | High | Software updates often break prior-year settings |
| December | Send client tax organizers; update engagement letters; review CPE requirements | High | Early organizers = earlier document collection |
| January 1–15 | Confirm IRS e-file system open date; test e-file with a sample return | Critical | IRS e-file typically opens mid-January |
| January 15–31 | Process first wave of returns (W-2 only clients) | High | W-2s due to employees by January 31 |
| February | Process second wave; identify complex returns; schedule planning calls | High | 1099s due by February 15 (brokerage statements) |
| March 1–15 | Identify clients who need extensions; process business returns | Critical | S-Corp and partnership returns due March 15 |
| March 15 | S-Corp (1120-S) and partnership (1065) deadline | Critical | File extensions for complex business returns |
| April 1–15 | Final push; process remaining individual returns; file extensions | Critical | Individual returns due April 15 |
| April 15 | Individual return deadline; Q1 estimated tax deadline | Critical | File extensions for all remaining returns |
| May–September | Process extended returns; IRS representation; tax planning | Medium | Off-season work keeps staff busy year-round |
Source: IRS Publication 509 (Tax Calendars); IRS.gov/filing
Many practitioners underestimate the volume of S-Corp and partnership returns due March 15. These returns are often more complex than individual returns — and clients are often slower to provide documents. Best practice: set a February 1 document deadline for all business clients. If documents are not received by February 1, file an extension immediately (Form 7004 for S-Corps and partnerships). The extension gives you until September 15 — but do not wait until September to complete the return.
Tax Season Capacity Planning
| Capacity Metric | Calculation | Example | Action If Over Capacity |
|---|---|---|---|
| Returns per preparer | Total returns / number of preparers | 200 returns / 2 preparers = 100 returns/preparer | Hire additional staff or turn away clients |
| Hours per return | Total available hours / total returns | 800 hours / 200 returns = 4 hours/return | Identify complex returns; allocate more time |
| Revenue per preparer | Total revenue / number of preparers | $200,000 / 2 preparers = $100,000/preparer | Target $100,000–$150,000 per preparer |
| Client-to-staff ratio | Total clients / total staff | 200 clients / 3 staff = 67 clients/staff | Target 50–80 clients per staff member |
| Extension rate target | Extensions / total returns | 30 extensions / 200 returns = 15% | 15–25% extension rate is normal; higher indicates capacity problem |
Source: NATP Practice Management Survey 2024; AICPA PCPS Survey 2024
2026 Key Tax Deadlines
| Deadline | Form | Who It Affects | Notes |
|---|---|---|---|
| January 15 | Q4 2025 estimated tax payment | Self-employed; investors | Pay via IRS Direct Pay or EFTPS |
| January 31 | W-2s to employees; 1099-NEC to contractors | Employers | File with SSA/IRS by January 31 also |
| February 15 | 1099-B, 1099-S, 1099-DIV (brokerage statements) | Brokerages | Clients often wait for these before filing |
| March 15 | S-Corp (1120-S) and Partnership (1065) returns | S-Corps; partnerships | Extension (Form 7004) gives until September 15 |
| April 15 | Individual (1040) and C-Corp (1120) returns; Q1 2026 estimated tax | Individuals; C-Corps | Extension (Form 4868) gives until October 15 |
| June 15 | Q2 2026 estimated tax payment; FBAR (FinCEN 114) for some filers | Self-employed; investors; expats | FBAR automatic extension to October 15 |
| September 15 | Extended S-Corp and Partnership returns; Q3 2026 estimated tax | Extended business filers | No further extension available |
| October 15 | Extended individual (1040) returns; FBAR deadline | Extended individual filers | No further extension available |
Source: IRS Publication 509 (Tax Calendars 2026); IRS.gov/filing
Background: Tom B., CPA, had 175 clients and was working 80-hour weeks from February through April. He was exhausted, making errors, and losing clients due to slow turnaround. Solution: implemented a systematic tax season preparation plan. Changes: (1) Sent tax organizers in December (previously January); (2) Set a February 1 document deadline for business clients; (3) Hired one seasonal preparer in November (previously waited until January); (4) Implemented TaxDome for document collection. Results: average turnaround time reduced from 3 weeks to 8 days; errors reduced by 70%; client satisfaction scores increased; Tom worked 55-hour weeks instead of 80-hour weeks during tax season.
Tax Season Client Communication Plan
| Communication | Timing | Channel | Content | Goal |
|---|---|---|---|---|
| Tax season kickoff email | January 2 | Welcome back; document checklist; deadline reminder | Get clients started early | |
| Document reminder #1 | January 20 | Remind clients to gather W-2s, 1099s; upload to portal | Early document collection | |
| Document reminder #2 | February 10 | Email + text | Reminder for missing documents; extension warning | Prevent last-minute rush |
| Return completion notice | Upon completion | Return ready for review; payment due | Prompt client review and payment | |
| Extension notice | April 10 | Extension filed; balance due reminder; next steps | Prevent client confusion | |
| Post-season check-in | May 15 | Thank you; planning opportunities; referral request | Client retention; referrals |
Source: AICPA PCPS Practice Management Guide 2024
Frequently Asked Questions
Send tax organizers in December — not January. Clients who receive organizers in December have more time to gather documents and return them before the tax season rush. Early organizers lead to earlier document collection, which allows you to complete returns earlier and reduce the end-of-season rush.
The industry benchmark is 50–100 individual returns per preparer per season, depending on complexity. A preparer handling only simple W-2 returns can do 150–200. A preparer handling complex returns (Schedule C, E, K-1s) should handle no more than 50–75. Monitor your capacity and hire additional staff if you are consistently over capacity.
Yes. If a client has not provided all necessary documents by your internal deadline (typically March 1–15 for individual clients), file an extension immediately. Extensions are free, give you until October 15, and prevent penalties for late filing. Communicate clearly to the client that an extension has been filed and that a balance due (if any) must still be paid by April 15.
Update your tax software to the latest version by January 1. Test the e-file system with a sample return before your first real e-file. Update your client portal software. Review and update your engagement letter template for the new year. Update your fee schedule. Verify that your PTIN is current (renewal deadline is December 31).
Set a February 1 document deadline for all business clients. If documents are not received by February 1, file Form 7004 immediately to extend the deadline to September 15. Complete all business returns by August 31 to avoid the September 15 rush. Never wait until September 14 to complete an extended business return.
Set clear communication expectations in your engagement letter: respond to all client inquiries within 24–48 business hours during tax season. Use your client portal to provide status updates automatically. Consider implementing a no-phone-calls-during-tax-season policy — direct all communication to email or the client portal. This alone can save 1–2 hours per day during peak season.
The information on this page is intended for licensed tax professionals (CPAs, EAs, and tax attorneys) and is provided for educational and research purposes only. Tax law is complex and fact-specific — all strategies discussed are subject to limitations, phase-outs, and conditions that may not apply to every client situation. Practitioners should independently verify all information against current IRS guidance, Treasury Regulations, and applicable state law before advising clients. This content does not constitute legal or tax advice.
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