Tax Preparation & Planning

US Business Tax
Preparation and
Planning

Year-round tax strategy for S-Corps, partnerships, C-Corps, and individuals with business income — so filing season is a formality, not a scramble. We prepare every major US business return, manage all deadlines, and build a proactive plan so your tax bill never comes as a surprise.

Returns We Prepare
Which tax forms does your business need?
Form 1120-S
S-Corporation annual return
Form 1065
Partnership & multi-member LLC
Form 1120
C-Corporation / 1120-F foreign corp
Form 1040
Individual with business income
FBAR · Form 5471 · Form 5472
International & foreign account compliance

Tax software we work with

Intuit ProConnect TurboTax Business Drake Tax UltraTax CS Lacerte Intuit ProConnect TurboTax Business Drake Tax UltraTax CS Lacerte
The Problem

Tax Season Should Not Feel Like a Fire Drill Every Year

Most business owners spend weeks chasing documents, second-guessing deductions, and paying more than they should — because their accountant only shows up in April.

Surprise tax bills in April Estimated payments were guesswork. Now there's a balance due with penalties on top.
Missed deadlines & late penalties S-Corp and partnership returns are due March 15 — two weeks before most people think tax season starts.
Deductions left on the table Without year-round planning, retirement contributions, entity elections, and timing strategies get missed permanently.
Wrong entity, wrong tax treatment Operating as an LLC when an S-Corp election could save $10K+ in self-employment taxes. The window to fix it closes.
What We Prepare

Every Return Type,
Done Right

Hover to explore each return we prepare — and what's included beyond the form itself.

Form 1120-S

S-Corporation Return

Your S-Corp return flows through to your personal return via Schedule K-1. We make sure the income, deductions, and shareholder allocations are accurate — and that you're not overpaying in distributions or salary.

  • Form 1120-S preparation & e-file
  • Schedule K-1 for each shareholder
  • Reasonable compensation review
  • Depreciation & Section 179 optimization
  • State return preparation (all 50 states)
  • Coordination with your personal 1040
Planning Insight

S-Corp shareholders must take a "reasonable salary" before distributions. Getting this ratio wrong triggers IRS scrutiny — and retroactive payroll taxes. We review and document this every year.

Form 1065

Partnership & Multi-Member LLC

Partnerships and multi-member LLCs file Form 1065 as an informational return — income, credits, and deductions then flow to each partner's K-1. Clean allocations prevent partner disputes and IRS notices.

  • Form 1065 preparation & e-file
  • Schedule K-1 for each partner/member
  • Guaranteed payments treatment
  • Capital account maintenance
  • State return preparation
  • Review of operating agreement for tax consistency
Planning Insight

Late K-1s create a domino effect — partners can't file their personal returns on time. We aim to have all K-1s delivered no later than February 28 so partners aren't holding things up downstream.

Form 1120 / 1120-F

C-Corporation Return

C-Corps pay tax at the entity level — making timing, compensation structure, and the choice between retaining earnings or paying dividends all critically important tax decisions. We plan, not just file.

  • Form 1120 preparation & e-file
  • Form 1120-F for foreign corporations
  • NOL carryforward tracking
  • QBI deduction analysis (for eligible structures)
  • Officer compensation strategy
  • State apportionment & nexus review
Planning Insight

For VC-backed startups or companies considering a sale, C-Corp structure and QSBS (Qualified Small Business Stock) eligibility can mean millions in tax-free gains at exit. We plan for this from day one.

Form 1040

Individual Return with Business Income

Business owners don't have a "simple" 1040. Between K-1s, Schedule C or E income, self-employment tax, estimated payments, and retirement contributions — your personal return is where the real planning happens.

  • Form 1040 with all applicable schedules
  • Schedule C for sole proprietors
  • K-1 income from S-Corps, partnerships, trusts
  • QBI deduction (Section 199A) optimization
  • Retirement contribution strategy (SEP, Solo 401k)
  • Estimated tax payment calculation for next year
Planning Insight

The QBI deduction (up to 20% of qualified business income) is one of the largest deductions available to business owners — but it phases out at higher income levels and has restrictions by industry. We optimize this before year-end, not after.

FBAR · 5471 · 5472

International Compliance Forms

US persons with foreign accounts, interests in foreign corporations, or foreign-owned US entities face some of the most complex — and heavily penalized — filing requirements in the tax code. We know them well.

  • FBAR (FinCEN 114) for foreign accounts over $10K
  • Form 5471 for US shareholders of foreign corps
  • Form 5472 for foreign-owned US corporations
  • GILTI and Subpart F income calculations
  • Foreign tax credit optimization
  • Treaty position analysis
Penalty Alert

FBAR penalties for willful failure to file can reach $100,000 or 50% of account value per year. Form 5472 penalties start at $25,000. These are not forms to overlook — or to file without expert guidance.

Year-Round Strategy

Planning That
Happens Before
December 31

Filing your return is the last step — not the only step. The strategies that lower your tax bill must be executed before the year ends. We work with you throughout the year so nothing is left to chance.

Clients who engage us for year-round planning consistently pay less in taxes than those who only come to us at filing time.

Estimated Tax Payments

Accurate quarterly estimates based on your actual income — not last year's numbers. No more surprise bills or underpayment penalties.

Entity Structure Review

Is your current entity still the right choice? S-Corp election, LLC conversion, or restructuring — we model the tax impact before you commit.

Retirement & Deduction Strategy

Maximize SEP-IRA, Solo 401(k), or defined benefit plan contributions. Time major purchases and depreciation for the most impact.

State Tax & Nexus Review

Remote employees and multi-state sales can trigger surprise state tax obligations. We identify exposure before it becomes a problem.

Income & Expense Timing

Deferring income or accelerating deductions into the right tax year can mean significant savings — but only if we plan before December 31.

Pre-Transaction Planning

Selling the business, bringing on investors, or making an acquisition? Tax structure before the deal is worth far more than minimizing the bill after.

Who We Work With

Built for Business Owners,
Not W-2 Employees

Our tax practice is designed exclusively for people with business income, complex structures, and real stakes in the outcome.

S-Corps & Partnerships

Pass-through entities with K-1s, salary optimization, and multi-owner complexity.

C-Corps & Startups

VC-backed companies, QSBS planning, and corporations preparing for a capital event.

Real Estate Investors

Short-term rentals, cost segregation, depreciation recapture, and 1031 exchange planning.

High-Income Owners

Business owners with $500K+ in income where QBI phaseouts, AMT, and NIIT require active management.

International Operations

US businesses with foreign accounts, foreign subsidiaries, or cross-border transactions requiring FBAR and 5471/5472 compliance.

Key Dates

Never Miss a
Tax Deadline Again

Every key date in the US tax calendar — by type, in order.

Filing Deadline
Quarterly Estimated
Extension Deadline
Year-End Planning
Jan
15
Quarterly Estimated

Q4 Estimated Tax Payment Due

Final estimated payment for the prior tax year. Missing this triggers an underpayment penalty even if you file on time in April.

1040 Self-Employed
Mar
15
Filing Deadline

S-Corp & Partnership Returns Due

Form 1120-S and 1065 are due one month before most owners expect. K-1s must be issued before partners can file their own returns.

1120-S 1065 K-1s
Apr
15
Filing Deadline

Individual & C-Corp Returns Due

Form 1040, 1120, and FBAR are all due today. This is the primary filing deadline for individual taxpayers and C-Corporations.

1040 1120 FBAR
Apr
15
Quarterly Estimated

Q1 Estimated Tax Payment Due

First quarterly installment for the current tax year. Falls the same day as annual returns — easy to miss when focused on filing.

1040-ES Self-Employed Quarterly
Jun
16
Quarterly Estimated

Q2 Estimated Tax Payment Due

Q2 is due in June, not July — an unusual schedule that catches many owners off guard.

Self-Employed Quarterly
Sep
15
Extension Deadline

Extended S-Corp & Partnership Returns Due

Final deadline for extended Form 1120-S and Form 1065. No further extensions available — missing this date triggers late filing penalties.

1120-S Ext. 1065 Ext.
Sep
15
Quarterly Estimated

Q3 Estimated Tax Payment Due

Third quarterly installment for the current tax year. Falls the same day as the S-Corp and partnership extension — a date worth circling twice.

1040-ES Self-Employed Quarterly
Oct
15
Extension Deadline

Extended Individual & C-Corp Returns Due

Final deadline for extended 1040, 1120, and FBAR. After this date, late filing penalties apply with no further recourse.

1040 Ext. 1120 Ext. FBAR Final
Dec
31
Year-End Planning

Last Day to Execute Year-End Tax Strategies

Retirement contributions, equipment purchases, income timing, and most planning strategies must happen before midnight. This is the most important date most people overlook — and the only one where missing it costs you permanently, with no extension or abatement available.

Retirement Section 179 Year-End Income Timing
Common Questions

Tax Services
FAQ

Everything you need to know before working with our tax team.

We prepare all major US business and individual tax returns, including Form 1120-S for S-Corporations, Form 1065 for partnerships and multi-member LLCs, Form 1120 and 1120-F for C-Corporations, Schedule C and Form 1040 for sole proprietors, and international compliance forms including FBAR, Form 5471, and Form 5472.
Both. Filing without planning is like printing a report card you never studied for. Our team works with you throughout the year — reviewing estimated payments, optimizing entity structure, identifying deductions, and timing income and expenses — so your tax return reflects strategy, not surprise.
S-Corp (1120-S) and Partnership (1065) returns are due March 15. C-Corp (1120) and individual (1040) returns are due April 15. Extensions are available — S-Corp and partnership extensions go to September 15; individual extensions go to October 15. We track all deadlines for you and file extensions when needed.
Act quickly. The IRS charges both failure-to-file and failure-to-pay penalties, which compound monthly. We handle late filings, penalty abatement requests, and IRS correspondence. The sooner you engage us, the more options we have to reduce your exposure.
Yes. We prepare FBAR (FinCEN 114) for foreign account reporting, Form 5471 for US shareholders of foreign corporations, and Form 5472 for foreign-owned US corporations. We also advise on treaty positions and foreign tax credit optimization.
We start with a brief onboarding call to understand your entity structure and situation. You share documents via our secure portal. We prepare a draft return, review it with you on a call, incorporate any changes, and file electronically. You receive a full copy of your filed return and a planning summary with action items for the coming year.
Prior year returns, your bookkeeping records or QuickBooks/Xero access, and any IRS notices or correspondence you have received. If your books are not ready, our bookkeeping team can clean them up before we file — so everything flows from one place.

Stop Leaving Tax Savings
on the Table

Your first consultation is free. 30 minutes, no obligation, no sales pressure.