The Ultimate Guide to Tax Season 2026: Everything Your Small Business Needs to Stay Compliant

Essential 2026 Deadlines

Monitor these dates. Avoid penalties.

Date	Requirement	Entity Type
Jan 15, 2026	Q4 Estimated Tax	Sole Prop, LLC, Individuals
Jan 31, 2026	Send W-2s to Employees	All Employers
Jan 31, 2026	File 1099-NEC	All Businesses
Mar 15, 2026	Form 1065 / 1120-S	Partnerships, S-Corps
Apr 15, 2026	Form 1040 / 1120	Individuals, C-Corps
Apr 15, 2026	Q1 Estimated Tax	All Businesses
Jun 15, 2026	Q2 Estimated Tax	All Businesses
Sep 15, 2026	Q3 Estimated Tax	All Businesses

Filing Commands

Mark calendars immediately.
Set recurring reminders.
Prepare documents 30 days prior.
Confirm electronic filing status.
Validate recipient addresses for W-2s.

OBBBA Compliance

One Big Beautiful Bill Act (OBBBA) changes. Apply these now.

Bonus Depreciation

Utilize 100% bonus depreciation.
Apply to qualified property.
Verify service dates after January 19, 2025.
Execute immediate expensing.
Maximize first-year tax savings.

Section 179 Limits

Note $1.2M+ expensing limit.
Monitor $3M+ phase-out threshold.
Index for 2026 inflation.
Track equipment acquisitions.
Log vehicle purchases.
Document building improvements.

QBI Deduction

Verify 20% pass-through deduction.
Confirm permanent status.
Check new income thresholds.
Identify Specified Service Trade or Business (SSTB) status.
Calculate deduction based on qualified income.

1099 Reporting Updates

New reporting thresholds apply. Update systems.

Threshold Change

Report payments exceeding $2,000.
Monitor non-employee compensation.
Collect Form W-9 from all vendors.
Verify TIN/EIN accuracy.
Archive signed W-9 forms.

1099-K Matching

Reconcile gross receipts with processors.
Check Stripe, PayPal, and Square reports.
Compare POS data to IRS filings.
Address discrepancies before filing.
Mitigate AI-driven audit flags.

Digital Assets

Answer mandatory crypto questions.
Record every digital transaction.
Log date, amount, and cost basis.
Identify fair market value.
Review Form 1099-DA.

LLC & BOI Rules

Maintain entity standing. File mandatory reports.

BOI Reporting

File with FinCEN.
Update for ownership changes.
Update for address changes.
Prevent daily non-compliance fines.
Maintain current officer lists.

Entity Maintenance

Confirm EIN validity.
Renew business licenses.
File state annual reports.
Pay franchise taxes.
Update Registered Agent services.

Deduction Checklist

Capture all eligible expenses. Reduce liability.

Mileage & Auto

Apply 72.5 cents per mile.
Log every business trip.
Record dates and purpose.
Maintain odometer readings.
Utilize mileage tracking apps.

Operating Expenses

Deduct rent and utilities.
Claim professional service fees.
Report insurance premiums.
Document advertising spend.
Track software subscriptions.
Verify notary service fees.

Self-Employment Tax

Calculate Social Security portion.
Note $184,500 earnings cap.
Apply SE tax to net earnings.
Pay quarterly estimates.

Records Management

Maintain organized files. Support every claim.

Income Records

Gather bank statements.
Compile merchant statements.
Record interest income.
Track legal settlements.
Document prizes and awards.

Expense Records

Store digital receipts.
Save invoices for capital assets.
Retain financing agreements.
Archive payroll records.
Log inventory valuations.

HR & Payroll

File Form 941 quarterly.
File Form 940 annually.
Distribute W-2s by Jan 31.
Track tip income documentation.
Review 2026 wage laws.

Action Plan

Implement these steps immediately. Ensure compliance.

Review Books: Reconcile all 2025 and 2026 accounts.
Update W-9s: Solicit new forms from active contractors.
Check BOI: Confirm initial filing with FinCEN.
Set Estimates: Calculate Q1 payments based on 2026 rules.
Audit Depreciation: Identify assets for 100% bonus write-off.
Schedule Services: Book tax preparation early.
Verify Compliance: Consult MCG Service for guidance.

10% OFF TAX PREPARATION CODE: MCG2024