Business and Individual Tax Return Preparation
Business Tax Return Preparation in Rancho Cucamonga
Every return is prepared and reviewed in our Rancho Cucamonga office by a CPA and Enrolled Agent, filed on time, and backed by the one person who can stand in front of the IRS and defend it. S corporation, partnership, LLC, C corporation and owner returns — for all 50 states.
March 15
Federal Form 1120-S and Form 1065 deadline for calendar-year filers
April 15
Federal Form 1120 and Form 1040 deadline for calendar-year filers
CPA + EA
AJ Singh, CPA and Enrolled Agent — federally authorized to represent taxpayers before the IRS
All 50 states
Business and personal returns prepared and filed nationwide — the Enrolled Agent license is federal
Which return does my business file, and when is it due?
Your entity type decides the form. An S corporation files federal Form 1120-S and California Form 100S. A partnership or multi-member LLC files Form 1065 with California Form 565 or Form 568. A C corporation files Form 1120 and California Form 100. Calendar-year 1120-S and 1065 returns are due March 15; 1120 and 1040 returns are due April 15.
Is this you?
What business owners call us about
Your 1120-S is due March 15 and the books are not closed
Your books have to match the bank statements, the loan balances and the payroll filings before the return can start. We quote the cleanup separately from the return, so you see both prices before you decide.
You took distributions all year and never ran payroll
An S corporation owner who works in the business must take a W-2 salary before distributions — it is the first thing an IRS examiner checks. Fixing it after the year closes costs more than setting it up right.
The LLC has partners, property or sales in a second state
One employee, one leased unit or enough sales in another state can create a return there. We file every state your business touches — all 50 if needed — with the deepest experience in California, Arizona and New Jersey, and we register you before the notice arrives.
Your K-1 is late and your personal return is stuck behind it
The K-1 — the form that reports your share of the business profit — comes off the business return, and your 1040 cannot be finished without it. We prepare both, so the K-1 goes straight into your personal return instead of sitting in another firm's queue.
Your preparer retired, moved, or stopped returning calls
Send last year's federal and California returns and the depreciation schedule. We read them before we quote, because most of what goes wrong in a business return was set up years earlier by someone else.
Which entity files what
S corporation, partnership or LLC, and C corporation, side by side
Find your entity across the top and read down. The form, the deadline, the way the profit is taxed and what California charges are all different — and picking the wrong column is how a return gets filed late or underpaid.
Scroll the table sideways to compare all three
How a return actually gets done here
From the first look at last year's return to the acceptance from the IRS and the FTB
- 1
We read last year's return before we quote
Send the prior-year federal and California returns, the depreciation schedule and the K-1s. AJ reads them personally. Most of what goes wrong in a business return was set up in an earlier year, and we would rather find it now than in September. Usually two business days.
- 2
Engagement letter, in writing, before any work starts
One page that lists every return we will file, every return we will not, who signs what, and the fixed fee. Audits, notices and unfiled years are priced separately, because nobody can price what an agency has not asked for yet.
- 3
Organizer and document intake through the secure client portal
You get a tax organizer — our checklist of questions and documents — and everything comes in through the secure portal. Returns carry Social Security numbers, EINs and bank details, so nothing travels as an email attachment. You upload once, we chase what is missing, and the whole file stays in one place.
- 4
Your books have to match the bank before a single form is opened
Cash, loans, payroll and equipment get tied to the year-end statements, and owner draws come out of expenses. If the books are behind, the cleanup is a separate quote and a separate decision. A return built on books that do not match the bank cannot be defended.
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Preparation: federal, California, and every other state you file in
Federal and state returns, every Schedule K-1, both the federal and the California depreciation schedules, and next year's estimated payment vouchers. If you file in more than one state, we work out which state taxes which slice of the income — and whether tax paid elsewhere earns a California credit — rather than guessing.
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Partner review before anything is signed
A second preparer reviews, then AJ signs. The review checks what carried over from last year, each owner's basis — the running total of money put in and taken out, which decides whether a distribution is taxable — and every place the California numbers split from the federal ones. Typically five to ten business days from complete records.
- 7
You review the return and sign the e-file authorization
You get the full return, the K-1s and a summary of what changed from last year. Nothing is transmitted until you sign the e-file authorization — Form 8879 for a personal return and its business equivalent for the company. Ask us anything before you sign.
- 8
We e-file, then we watch for the acknowledgement
We transmit, then confirm in writing that the IRS and the FTB accepted the return, with payment instructions and due dates. A return that was rejected and never re-sent is not a filed return — people usually learn that from a notice.
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Then the planning conversation for next year
After the return is accepted, not during March. Entity choice, salary against distributions, equipment timing, estimated payments, and whether an S election is worth making. Nothing on a return filed in March can be changed in March. Next year still can be.
The four things that catch people out
What decides whether a business return is right, on time and payable
These four issues produce most of the notices, penalties and amended returns we see on business filings prepared elsewhere. None of them are exotic. All four are fixable in advance.
An extension is more time to file. It is not more time to pay.
Form 7004 for a business and Form 4868 for a person buy six more months to file, not to pay. Interest and late-payment penalties run from the original deadline, so we estimate the balance and pay it with the extension. California extends automatically — no form — but its payment is due on time too.
California does not follow the federal rules you already planned around
The federal qualified business income deduction does nothing for your California bill, bonus depreciation is not allowed, and the Section 179 equipment write-off is capped at $25,000 against a 2026 federal limit of $2,560,000. Every asset needs its own California depreciation schedule.
Multi-state filing starts with people, property or sales in another state
One employee, one leased location or enough sales in another state can create a tax return there. We prepare and file business returns in all 50 states — deepest experience in California, Arizona and New Jersey — and we register you before the notice arrives, not after.
Trucking is three different returns, not one
Trucking is three filing patterns, and yours decides the tax. An owner-operator or a leased-on 1099 driver files Schedule C and pays self-employment tax on the profit. An S corporation carrier puts the owner on W-2 payroll. Fuel tax (IFTA) and the Form 2290 truck tax live on our trucking page.
Who prepares and who signs
The person who signs your return is the person who defends it
AJ Singh
Managing Partner, G&S Accountancy Inc
CPA and Enrolled Agent
AJ Singh, CPA and Enrolled Agent — federally authorized to represent taxpayers before the IRS. He reads every new client's prior-year return personally, signs the returns his firm files, and takes the call when a notice arrives on one of them. The person who decides a filing position is the same person who has to defend it in front of the IRS or the FTB — so we only take positions we can support. He recently brought a business that was three years behind on both its company and personal returns fully current — all three years prepared as a single engagement, filed, and accepted by the IRS and California.
Our preparation and review team
Return preparation, second-preparer review, and the monthly bookkeeping the return is built from
Every business return is prepared by one person and reviewed by a second before it is signed. The same team keeps the monthly books for many of the businesses whose returns they prepare, so your numbers are not being seen for the first time in March. Where we do not keep the books, the cleanup and bank-matching happen before the return starts — not alongside it.
Where our return work concentrates
Industries we file the most returns for
Trucking, logistics and owner-operators
Schedule C owner-operators, leased-on 1099-NEC drivers, and S corporation carriers with the owner on W-2 payroll. We record settlement checks at the full amount — not what is left after the factoring company's cut — and keep the federal and California equipment schedules separate. IFTA and Form 2290 live on our trucking page.
Construction and contractors
Job costing that survives into the return, retention — the slice of each invoice the customer holds back until the job ends — counted correctly, method choices on long-term contracts, and subcontractor 1099 filings. Our construction page covers the licensing and payroll side.
Convenience stores, franchisees and fuel retail
Multiple entities, related-party rent, in-store profit tracked separately from fuel profit, and inventory counts that decide whether the cost of goods sold on the return means anything. Often one owner, several returns, and one coordinated set of K-1s at the end.
Multi-entity owners and real estate
An operating company, a property LLC and a personal return that only closes when the other two do. We sequence the returns so each K-1 lands in the right order, and we track owner basis year by year instead of rebuilding it during an audit.
Questions business owners actually ask
Business tax preparation questions
Calendar-year S corporation returns (Form 1120-S) and partnership returns (Form 1065) are due March 15; C corporation returns (Form 1120) and personal returns (Form 1040) are due April 15. California uses the same dates for the matching state returns. A timely extension adds six months — to September 15 or October 15. A due date that lands on a weekend or federal holiday moves to the next business day.
Before we start
What to send us
Business returns: what to send
Send what you have. We will tell you what is actually required and what can wait.
- The last two years of filed federal and California returns
- The prior-year depreciation schedule, showing both the federal and the California basis
- Year-end trial balance report from your bookkeeping software, or a login to QuickBooks or Xero
- December bank and credit card statements for every account, including the one nobody uses
- Loan and line-of-credit statements showing the year-end balance and the interest paid
- Fixed assets bought, sold or traded during the year, with the invoices
- Payroll filings for the year: Forms 941, 940, W-2, W-3, DE 9 and DE 9C
- Every Form 1099 you issued and every Form 1099 you received
- Form 2553 and the IRS acceptance letter, if the entity elected S status
- Any IRS, FTB, CDTFA or EDD notice that arrived during the year
Individual returns: what to send
The owner's personal return usually cannot be finished until the business return is filed, so send both sets together.
- Last year's filed Form 1040 and California Form 540
- Forms W-2 for everyone on the return
- Schedule K-1s from every partnership, S corporation, estate or trust
- Forms 1099-INT, 1099-DIV and 1099-B, plus year-end brokerage statements
- Form 1098 mortgage interest, and property tax actually paid during the year
- Escrow closing statements for any property bought, sold or refinanced
- Form 1095-A and any other health coverage documents
- Estimated tax payments made, with the dates and amounts, federal and California
- Tuition on Form 1098-T, student loan interest on Form 1098-E, and childcare provider details
- Any IRS or FTB notice that arrived during the year
Talk to the person who will sign the return
March 15 or April 15 coming, or already on extension and running out of runway?
Send last year's federal and state returns and your year-end balances. AJ Singh, CPA and Enrolled Agent — federally authorized to represent taxpayers before the IRS — reads every new client's return personally and tells you what needs filing, what it will cost, and what the real deadline is. You will hear back the same business day if it reaches us before 3pm Pacific. Call 909-217-7855, or use the form. G&S Accountancy Inc, Rancho Cucamonga, California — serving Ontario, Fontana and the wider Inland Empire, and preparing business and personal returns for all 50 states.
Request a 20-minute consultation
Name, email, phone, your entity type, and one sentence about where the return stands. Nothing else.