Small Business Tax Preparation
S-corporation, partnership, C-corporation, and owner returns prepared as one connected tax picture—not a stack of disconnected forms.
A guide by Taxstra Tax & Accounting · CPA-led tax strategy for business owners
Written by Bryan Martin, CPA, Managing Partner and Founder of Taxstra. Rebuilt August 10, 2026.
Taxstra prepares business returns for profitable owner-led companies nationwide, with the entity return, K-1s, state filings, and owner-level consequences reviewed together. The best fit is an owner who wants accurate compliance now and a clear path into proactive planning before the next tax year is already over.
What Business Tax Preparation Includes
Federal entity return
The complete S-corporation, partnership, or corporation filing with required schedules.
State and multistate scope
Resident, nonresident, composite, withholding, franchise, or entity filings identified during scoping.
Owner coordination
K-1 and owner-level items aligned with the related individual return when that return is in scope.
Book-to-tax review
Books, fixed assets, payroll, equity, distributions, and prior-year carryovers reconciled before filing.
Extension and estimate support
Expected balances and extension payments estimated from the best available records.
Review and e-file
Draft return review, open-item resolution, signatures, e-filing, and final return delivery.
The engagement letter controls the exact deliverables. Payroll filings, bookkeeping cleanup, amended returns, elections, notice defense, entity formation, and transaction modeling are scoped separately unless listed.
S-Corp, Partnership, and Corporate Returns
| Entity | Core federal filing | What must coordinate |
|---|---|---|
| S corporation | Form 1120-S and shareholder K-1s | Payroll, officer compensation, distributions, basis, fixed assets, states |
| Partnership / multi-member LLC | Form 1065 and partner K-1s | Allocations, capital accounts, guaranteed payments, basis, debt, state filings |
| C corporation | Form 1120 | Officer compensation, retained earnings, fixed assets, state corporate filings |
| Sole proprietor | Schedule C with Form 1040 | Business books, estimated payments, assets, home office, vehicle, retirement |
The form is only the container. A reliable return starts with books that explain cash, debt, fixed assets, payroll, owner transactions, and equity. When the books do not close, Taxstra identifies whether the issue can be resolved inside preparation or needs a separate catch-up bookkeeping scope.
Who This Service Is Built For
Taxstra is built for owners whose return affects decisions throughout the year—not a once-a-year commodity filing.
Physician and professional practices
Entity returns, payroll, retirement plans, state exposure, and owner tax projections.
Real estate investors and sponsors
Partnerships, K-1s, fixed assets, cost segregation coordination, and multistate portfolios.
Consultants and online businesses
S-corporation filings, payroll, contractor reporting, estimated payments, and clean close workflows.
Multi-entity owners
One team coordinating operating companies, holding entities, real estate, and the individual return.
Not every return is a fit
If records are unavailable, ownership is disputed, aggressive positions cannot be supported, or prior filings need a forensic rebuild, Taxstra will define the prerequisite work or decline the engagement rather than force a return through.
How Nationwide Remote Preparation Works
Fit and scope
We identify every entity, owner, state, deadline, and related service before quoting the engagement.
Secure intake
You upload prior returns, books, payroll, fixed assets, ownership changes, notices, and major transaction records.
CPA-led preparation
The team reconciles open items, prepares the filings, and surfaces decisions that need owner input.
Review and approval
You receive a draft, questions are resolved, balances and elections are explained, and signatures are collected.
File and hand off
Accepted filings and final copies are delivered, with open planning items routed into the next-year advisory conversation.
Scope and Fixed-Fee Quote
Taxstra does not price a clean single-state S-corporation the same as a multistate partnership with late books and ten K-1s. The quote follows a short fit review of entity type, states, ownership, bookkeeping condition, payroll, fixed assets, prior returns, and the individual returns that must coordinate.
You receive a written scope and fixed fee before work starts. That clarity matters more than a low teaser price that expands through add-ons after your deadline is close.
For a broader explanation of what changes CPA fees, see How Much Does a CPA Cost?
Why Preparation and Advisory Belong Together
A correct return reports decisions already made. Tax advisory changes decisions while the year is still open: entity structure, payroll, retirement plan design, real estate transactions, equity compensation, multistate work, and estimated payments.
Taxstra combines the compliance view with proactive planning. The same records used to prepare the return become the baseline for the next projection, so an idea does not die between an outside adviser and the person who signs the filing.
See Taxstra's year-round tax advisory service or read the tax strategist guide.
CPA + MBA + licensed real estate broker perspective
Taxstra is a nationwide remote firm based in Springfield, Illinois, serving approximately 1,500 clients. Founder Bryan Martin, CPA, MBA, is also a licensed real estate broker and appeared on White Coat Investor Podcast Episode 459.
What that changes
Entity returns are reviewed in the context of the owner, the books, real estate, investments, states, and the decisions coming next—not isolated at form level.
Meet Bryan MartinBusiness Tax Preparation FAQs
Primary conversion
See whether your return belongs with Taxstra
Choose a time below. We will use the call to understand the entities, states, books, deadlines, and whether preparation-only or preparation-plus-advisory is the right scope.
One connected return, one accountable team
Bring the entity, owner, states, and planning opportunities into one CPA-led engagement.
Book a Business Tax Fit Call