Business Tax Returns
September 15th for S corp, 1065 and October 15 C Corp filing deadline
File your business tax return with a CFO who has done it for 30+ years.
S corp, partnership (Form 1065), LLC, or Schedule C — we confirm your exact deadline, file cleanly, and handle extensions and Q4 estimated payments so nothing slips past October 15/16.
Free 15-minute call · No obligation · S corp, 1065, LLC & Schedule C specialists
SEPTEMBER 15/OCTOBER 15 DEADLINE
The September 15/October 15 business tax return deadline is closer than it looks.
If your S corp, partnership, LLC, or Schedule C business is on the hook for a federal business tax return, the clock is running. Form 1120-S and Form 1065 are due September 15/ October 15 and extensions buy time to file, not time to pay. A fast review in the next two weeks catches missing 1099s, K-1 shortfalls, and Q4 estimated-payment gaps before they become penalties, interest, and amended returns.
That is exactly what our free 15-minute deadline check is built for: one call, your entity type, your status, and a clear next step before the 15th.
Three things to settle before October 15
Confirm the filing due date
1120-S and 1065 returns are due September 15 and October 15 for C Corps. Know which date your entity lands on.
Gather the documents that slow filings down
K-1s, 1099s, payroll records, and a clean Q4 close. Missing paperwork is the most common reason a business tax return slips past the deadline.
Reconcile Q4 estimated payments
An extension postpones the return, not the tax. Check your Q4 payment now to avoid underpayment penalties and interest.
S corps, partnerships, LLCs, and Schedule C filers — we review every entity type.
Who We Serve
The business tax return filers we handle
S Corporation
Form 1120-S and K-1s. We file your S corp business tax return and keep pass-through allocations clean and defensible.
Partnership / Form 1065
Form 1065 with partner K-1s. We handle your partnership business tax return, allocations, and the Oct 15 deadline.
LLC
Single-member, multi-member, or S corp elections. We file your LLC business tax return the right way for your structure.
Schedule C
Sole proprietors and side businesses. We file your Schedule C business tax return and protect every deduction.
Not sure which structure applies to your business tax return? We’ll sort it out in a free 15-minute deadline check.
Clear business tax return support, without a full-time CFO.
We keep your business tax return on schedule, defensible, and easy to understand — from year-end filing through extensions and Q4 estimated payments.
Business tax return filing
We prepare and file the right return for your S corp, partnership 1065, LLC, or Schedule C business — with clean numbers and clear deadlines.
Extensions when you need them
If September 15 or October 15 is getting close, we help you file the right extension and avoid last-minute panic — while keeping your compliance path simple.
Q4 estimated payments
We review your quarterly cash flow and estimate the right payment so you stay ahead of the IRS — not scrambling at year-end.
30+ YEARS OF BUSINESS TAX RETURNS
Three decades of filing. Zero deadline surprises.
For more than 30 years, Rick has prepared business tax returns for S corps, partnerships, LLCs, and Schedule C owners. That depth shows up where it counts: filings that pass review cleanly, deadlines that are tracked before they become problems, and cash-flow numbers you can actually plan around.
Fewer deadline surprises
Filing windows, extension dates, and Q4 estimated payments are tracked early — so the September 15 / October 15 rush never becomes a scramble.
Cleaner filings, first pass
Every business tax return is prepared with the detail and documentation that keeps returns accurate, defensible, and ready for review.
Cash flow you can plan around
Estimated payments and year-end positioning are reviewed with real numbers, so you know what to set aside before the quarter closes.
Book your free 15-minute business tax return deadline check
Tell us your entity type, the filing deadline you are worried about, and the best time to call. We will confirm your next step for your S corp, partnership, LLC, or Schedule C business tax return.
Deadline check details
Fields are kept tight so you can request a call in under a minute. No account, no lengthy intake, and no obligation.
Full name
First and last name
Business type
S corp, partnership / Form 1065, LLC, or Schedule C
Filing deadline concern
Original filing, extension, Q4 estimated payment, or amended return
Preferred call time
Best day and time window for a short call
If you are close to the October 15 or October 16 deadline, mention it in your preferred call time so we can prioritize the call.
What happens after you submit
We review your entity type and deadline concern, then confirm a short call window to identify whether you need an extension, Q4 estimated payment, filing plan, or immediate next step.
Deadline reminder: many business tax return positions change quickly in late October. The earlier we review your filing status, the more options you keep.
- Clear next step for your business tax return
- Fast response before the deadline pressure builds
- No obligation beyond the 15-minute call
Don’t let your business tax return deadline catch you off guard.
Book a free 15-minute deadline check to confirm whether an extension, Q4 estimated payment, or final filing is the right next step for your S corp, partnership, LLC, or Schedule C business.