Small business tax preparation from books that already reconcile. We prepare federal and state returns, review them with you and e-file in all 50 states. One flat fee by entity and complexity, quoted before work starts.
Tax year 2025
Filing package
Certified on the platforms your business already runs on
Small business tax preparation services turn a year of records into returns that are correct, complete and filed on time. The form-filling is largely mechanical. What decides the result is the quality of the records underneath. A return from reconciled books takes days. A return from a shoebox takes weeks and still misses deductions.
Most tax problems are bookkeeping problems that showed up in April. Deductions get missed because nobody coded them during the year. Estimates are wrong because they used last year's figures. A state filing duty began in June and got noticed in March. Each is easy to fix when it happens and costly to fix at the deadline. That is the case for tax preparation outsourcing to the service that already keeps your ledger.
Outsourced tax preparation is often sold as one return and a signature. Most penalties come from the smaller filings spread across the year, so those are covered too.
The returns themselves, prepared, reviewed with you and filed.
Schedule C, single and multi-member LLCs, Form 1065 partnerships and Form 1120-S S corporations.
Form 1040, including the owner return that sits beside a business filing.
Prepared and issued with the entity return, on the same timeline.
Form 990 for tax-exempt organizations, on the same flat-fee basis.
No forced migrations and no proprietary portal. We plug into your existing stack, or help you pick the right one during onboarding.
The deadline is not the hard part. Arriving at it with twelve months of reconciled books is what changes the result.
Usually a bookkeeper closes the year, then a separate preparer reconciles it again because they cannot take someone else's word. You pay for both. When Twelix does both, the checking already happened monthly. The return starts from books everyone trusts.
A deduction never coded as one is a deduction nobody finds at the deadline. The costly part is not claiming it. It is spotting it a year later from a bank line that says nothing useful. Coding it right when it happens costs nothing extra.
Estimates based on last year are a common source of surprise bills, or of overpaying while sales fall. Current books turn the estimate into arithmetic, not a forecast. It can be revised in the quarter the business changes, not the next March.
Same return, same deadline, same forms. What differs is everything that has to happen before any of it can be filled in.
Each return has a clear end: accepted by the IRS and your states. The scope, fee and timeline are set before it begins.
Step one
Your entity type, the states you owe in, and how current the books are. That last point sets the timeline.
Once we have talked
A fixed fee and a list of exactly what we need from you, not a generic checklist.
Preparation
Prepared from the closed books, with the year's expenses checked against what your entity can deduct.
Before filing
We walk you through the return and answer your questions. Nothing is filed without your sign-off.
A tax engagement uses the most sensitive records a business holds, including Social Security numbers. Here is how we handle them, before you send anything.
Files move through a secure portal, not email attachments, and stay there. Sensitive records are never passed around inboxes.
Every return gets a second review before you see it. That second pass is part of the fee.
You see the finished return and understand it before it is sent. Nothing is e-filed on an assumption.
Your returns are prepared and reviewed inside Twelix, never passed to a marketplace or a seasonal contractor.
Owners who moved their books to Twelix, on what changed afterward.
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Behind, stuck, or not sure the numbers are right? Send us the basics. We will review your file and tell you plainly what we find.
We already know what your chart of accounts needs to look like, which numbers matter, and where the books usually go wrong.
Payouts from every sales channel and sales tax, reconciled.
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Job costs, work in progress and retainage, tracked by job.
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Insurance claims, deposits and job cost, tracked by roof.
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A P&L for each property, plus escrow and owner draws.
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Daily POS sales, tips owed and food cost as a share of sales.
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Insurance payments and patient balances, matched to the bank.
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Cost per mile, IFTA fuel tax and driver pay, tracked.
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Deferred revenue, MRR and R&D tax credit support.
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Billable hours, work in progress and retainer balances.
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Restricted funds, grant tracking and Form 990 prep.
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Crop cycles, equipment depreciation and subsidy income.
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Recurring memberships, class packs and failed payments.
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Client deposits, vendor prepayments and margin per event.
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Revenue for each cohort, refunds and instructor pay.
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280E cost allocation and seed-to-sale reconciliation.
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Twelix quotes tax preparation as one flat fee, based on entity type and return complexity, not hourly. A single-member LLC filing in one state sits at the low end. An S corporation with several shareholder K-1s and multi-state filings sits higher. You get a fixed fee in the free consultation, before work starts. It does not rise if the return turns out more involved.
We do both: we prepare the return, review it with you line by line, then e-file federal and state. Nothing is sent without your sign-off. If you would rather your own CPA file it, we deliver a complete, CPA-ready package instead. The price is the same either way.
Tax preparation outsourcing means an outside provider prepares and files your business returns, instead of you or an in-house hire. For a small business, the gain is more than hours saved. With outsourced tax preparation from Twelix, the service that closed your books prepares the return from them. That removes the second round of reconciling that usually happens before anyone files.
We handle Form 1040 individual returns and business returns for most small entity types. That covers sole proprietors on Schedule C, LLCs, partnerships on Form 1065 and S corporations on Form 1120-S. It includes the K-1s that go to each partner or shareholder. We also prepare Form 990 for nonprofits, and file in all 50 states.
For calendar-year businesses, partnership and S corporation returns are due March 15, and C corporation and sole proprietor returns April 15. When a date falls on a weekend, it moves to the next business day, as March 15, 2026 did. Forms 1099-NEC go to contractors and the IRS by January 31. Form 7004 gives a business six more months to file, but not to pay.
Yes, we figure quarterly estimates from current books and file your 1099s on time. Estimates are due April 15, June 15, September 15 and January 15. Using this year's figures, not last year's, helps avoid a surprise at filing. For 1099s, we collect W-9s before January and file Forms 1099-NEC and 1099-MISC. For payments made in 2026, the reporting threshold rose from $600 to $2,000.
Yes, you can legally prepare your own business return, and many sole proprietors do with software. It gets harder with an S corporation, a partnership, payroll or sales in several states. Those bring K-1s, state filings and basis tracking, a running record of each owner's investment, that software will not check for you. If your books are not reconciled, the return carries their errors either way.
We prepare past-due returns oldest year first, so each one builds on a correct prior year. Where the books for those years are incomplete, we scope the bookkeeping catch-up first. A return filed from rebuilt guesses is worse than a late one filed from real records. Penalty relief and IRS payment plans are best discussed with a CPA or enrolled agent.
Keeping the books through the year is what makes filing at the end simple. These services are scoped and priced on their own.
Your books kept current, closed and reported by the 10th.
Learn moreMonths or years of backlog rebuilt and reconciled.
Learn moreCertified ProAdvisors running your QuickBooks file properly.
Learn moreXero-certified books with Hubdoc and bank feeds handled.
Learn moreAccrual close and month-end analysis without a hire.
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Start with a free tax consultation. We will confirm which returns you owe and where, look at the state of your books, and send a flat quote within 24 hours.
Flat rate by entityReviewed before filingAll 50 states
