BUSINESS TAX SERVICES
Business Tax Returns
Accurate preparation and strategic filing for LLCs, S-Corps, C-Corps, partnerships, and sole proprietorships across Wisconsin and Illinois. We handle every form, every deadline, and every planning opportunity so you keep more of what you earn.
WHAT WE FILE
Business Returns We Prepare
Every business entity has different filing requirements, deadlines, and planning opportunities. Whether you operate as a sole proprietor, partnership, LLC, S-Corporation, or C-Corporation, your return requires entity-specific knowledge and careful attention to federal, state, and local obligations. We handle the full range of business returns — from straightforward single-entity filings to complex multi-state, multi-entity structures — so you can focus on running your company while we focus on accuracy and tax savings.
S-Corporation Returns
Form 1120-S preparation for S-Corps, including shareholder K-1 schedules, reasonable compensation analysis, and distribution planning to minimize combined tax liability. We coordinate your corporate return with each shareholder’s individual filing to ensure consistency and identify pass-through planning opportunities that reduce total tax across all levels.
C-Corporation Returns
Form 1120 filing for C-Corps, covering accumulated earnings planning, dividend strategies, and compliance with federal and state corporate tax requirements. We analyze your effective tax rate, evaluate Section 199A implications, and advise on retained earnings strategies that balance growth needs against double-taxation exposure.
LLC & Partnership Returns
Form 1065 preparation for partnerships and multi-member LLCs, including partner allocations, guaranteed payments, and K-1 distribution to all partners. We review your operating agreement to ensure allocations comply with Section 704(b) substantial economic effect rules and advise on special allocations when appropriate.
Sole Proprietorship Returns
Schedule C preparation for sole proprietors, including home office deductions, vehicle expenses, and self-employment tax optimization strategies. We evaluate whether your business would benefit from an entity election, calculate the SE tax savings from an S-Corp conversion, and ensure you claim every deduction available under current law.
Multi-State Filing
Coordinated filing across Wisconsin, Illinois, and other states where your business has nexus, including apportionment calculations and credit for taxes paid. We monitor evolving economic nexus thresholds, advise on voluntary disclosure agreements when exposure exists, and ensure your apportionment methodology is defensible under audit.
Payroll Tax Compliance
Quarterly 941 filings, annual W-2 and 1099 preparation, state unemployment returns, and payroll tax deposit scheduling to avoid penalties. We coordinate payroll reporting with your return preparation, reconcile wages across all forms, and flag officer compensation issues before they trigger an IRS inquiry.
Quarterly Estimated Taxes
Calculation and tracking of federal and state estimated tax payments, including safe harbor analysis and cash flow planning to prevent underpayment penalties. We project your annual liability each quarter using updated financials, adjust for seasonal revenue fluctuations, and recommend payment amounts that balance cash flow with penalty avoidance.
Amended Returns
Preparation of amended federal and state returns to correct errors, claim missed deductions or credits, and respond to changes from prior-year audits. We review up to three open tax years for overlooked opportunities and file amended returns when the potential refund or correction justifies the effort.
WHY JTA-CPA
Why Businesses Choose JTA for Tax Filing
Business Tax Expertise You Can Rely On
Business tax returns are more complex than individual filings. Entity structure, revenue recognition, depreciation schedules, payroll obligations, and multi-state nexus all affect how your return is prepared and what you ultimately owe. Getting it wrong means penalties, missed deductions, or an IRS inquiry. Many business owners rely on general-purpose tax software or preparers who lack experience with entity-level returns, and the result is often a return that is technically filed but far from optimized.
JTA-CPA brings over 15 years of hands-on experience preparing returns for small businesses, professional practices, real estate investors, and multi-entity structures. We don’t just file your return — we review your full financial picture to identify planning opportunities that reduce your tax burden year over year. That includes evaluating your entity election, coordinating pass-through income with your personal return, and advising on timing strategies for income and deductions that lower your effective rate. View our business tax preparation fees.
Our clients range from single-member LLCs generating their first year of revenue to established multi-entity groups with operations across multiple states. Regardless of size, every return receives the same level of scrutiny. We review prior-year filings for missed opportunities, reconcile book-to-tax differences, and ensure that depreciation methods, inventory accounting, and revenue recognition are applied correctly under current IRS guidance. When your situation changes — a new partner, a business acquisition, or expansion into a new state — we adjust your filing strategy accordingly.
Licensed & Experienced
Every business return is prepared or reviewed by Steven Towne, who holds three professional certifications and has filed hundreds of business returns across all entity types. His background in internal audit and information systems adds a layer of analytical rigor that general tax preparers simply cannot match — particularly for businesses with complex transactions, multiple revenue streams, or regulatory reporting requirements.
CPA
Certified Public Accountant
CIA
Certified Internal Auditor
CISA
Certified Information Systems Auditor
HOW IT WORKS
Our Business Tax Filing Process
Initial Consultation
We review your business structure, prior returns, and current financial position to understand your filing needs and identify planning opportunities before preparing anything. This initial conversation covers entity type, ownership changes, new revenue sources, and any tax events from the prior year so we start with a complete picture.
Document Collection
Upload financial statements, bank records, payroll reports, and prior returns through our secure client portal. We provide a customized checklist based on your entity type and industry so nothing gets missed, and we follow up on outstanding items well before the filing deadline.
Preparation & Review
We prepare your return with line-by-line accuracy, apply all eligible deductions and credits, and review the completed filing with you before submission. Every return goes through a multi-point quality review that checks for common errors, verifies consistency across schedules, and confirms that planning strategies are properly reflected.
Filing & Year-Round Support
After filing, we remain available for estimated tax calculations, IRS correspondence, mid-year planning, and any questions that come up throughout the year. We proactively reach out before quarterly payment deadlines and year-end so you always have time to act on planning opportunities.
FAQ
Business Tax Return Questions
Answers to common questions about business tax filing requirements, deadlines, entity elections, and what to expect when working with JTA-CPA. If you don’t see your question below, contact us directly — we’re happy to discuss your specific situation during a free initial consultation with no obligation.
What entity types do you prepare returns for?
We prepare federal and state returns for S-Corporations (Form 1120-S), C-Corporations (Form 1120), partnerships and multi-member LLCs (Form 1065), and sole proprietorships (Schedule C). We also handle single-member LLC returns reported on the owner’s individual return. For businesses with multiple entities under common ownership, we coordinate all filings to ensure consistency across returns, optimize intercompany transactions, and identify consolidated planning opportunities that reduce the total tax across all related entities.
When are business tax returns due?
S-Corporation and partnership returns are due March 15 (or the 15th day of the third month after the fiscal year ends). C-Corporation returns are due April 15 for calendar-year filers. Extensions are available for all entity types, giving an additional five to six months to file without penalty — though any tax owed is still due by the original deadline. We track all deadlines, file extensions proactively, and send reminders well in advance so you never face a late-filing penalty. See our tax due dates page for a complete calendar of federal and state deadlines.
How do you handle multi-state filing requirements?
If your business has employees, property, or revenue in more than one state, you likely have nexus and a filing obligation in each. We prepare all required state returns, calculate income apportionment using the applicable formulas — whether single-factor sales, three-factor, or market-based sourcing — and claim credits for taxes paid to other states to minimize double taxation. We also monitor evolving economic nexus thresholds triggered by remote sales activity and advise on voluntary disclosure agreements when prior-year exposure exists.
Can you help with S-Corp election and entity restructuring?
Yes. We evaluate whether an S-Corp election makes sense based on your income level, self-employment tax exposure, and distribution needs. If the election is beneficial, we prepare Form 2553, advise on reasonable compensation levels that will withstand IRS scrutiny, and restructure your payroll and distributions accordingly. For businesses that have outgrown their current entity structure, we also assist with conversions — such as moving from a sole proprietorship to an LLC or from an LLC to an S-Corp — and manage the tax implications of each transition.
What records do I need to provide for my business return?
At a minimum, we need a full-year profit and loss statement, balance sheet, bank and credit card statements, payroll reports, loan statements, and any 1099s received or issued. If you use QuickBooks or other accounting software, we can pull reports directly. We provide a detailed checklist tailored to your entity type and industry, and we follow up on outstanding items before the filing deadline so nothing delays your return.
Do you handle IRS notices or audits related to business returns?
Yes. As a licensed CPA, CIA, and CISA, Steven Towne is authorized to represent your business before the IRS under Circular 230. We respond to notices, manage correspondence audits, and represent you in field examinations. We also prepare amended returns when needed, negotiate installment agreements or offers in compromise, and pursue penalty abatement when reasonable cause exists. For more complex enforcement matters, see our IRS Representation page.
What is included beyond filing the return?
Every engagement includes year-round access for tax questions, estimated tax calculations each quarter, planning discussions before year-end to optimize your position, and coordination with your bookkeeper or accountant if you have one. We also review your entity structure annually to confirm it still serves your best interest as your business grows, and we proactively flag regulatory changes or new planning opportunities that affect your situation.
JTA-CPA provides tax preparation, year-round planning, and advisory services to businesses and individuals throughout Southeast Wisconsin and Northern Illinois. From entity selection and return filing to mid-year estimated payments and IRS representation, we deliver the full scope of business tax support under one roof.
Ready to File Your Business Return?
Schedule a free consultation to discuss your business filing needs. We’ll review your entity structure, identify deductions and credits you may be missing, and make sure your return is filed accurately and on time. Whether you’re filing your first business return, transitioning from a sole proprietorship to an S-Corp, or looking for a more proactive CPA relationship that goes beyond once-a-year filing, we’re here to help you keep more of what your business earns.
