What services does DWK Tax & Accounting offer?

DWK Tax & Accounting offers tax preparation and planning, bookkeeping, accounting, business advisory, and outsourced CFO services for individuals and small businesses in Wheaton, IL and DuPage County.

Where is DWK Tax & Accounting located?

DWK Tax & Accounting is based in Wheaton, Illinois, serving clients throughout DuPage County including Naperville, Glen Ellyn, Lisle, Downers Grove, and the greater Chicago suburbs.

Do you work with small businesses?

Yes. DWK Tax & Accounting specializes in serving small business owners, entrepreneurs, and growing companies who need more than basic tax compliance, including strategic advisory and fractional CFO support.

How do I schedule a consultation?

You can schedule a consultation by visiting https://dwkcpa.com/contact, calling (708) 369-0044, or emailing david@dwktaxaccounting.com.

What types of business tax returns do you prepare?

DWK prepares returns for every common business entity: LLCs (single-member and multi-member), S corporations (Form 1120S), partnerships (Form 1065), C corporations (Form 1120), and sole proprietors (Schedule C). We also file the corresponding Illinois state business returns.

When are business tax returns due?

Partnership and S corp returns are due March 15, while C corporation returns are due April 15 for calendar-year filers. Illinois follows the same deadlines. We track every due date, file extensions when needed, and ensure K-1s reach owners in time for their personal filings.

Do you prepare both federal and Illinois business returns?

Yes. Every business engagement includes the federal return and the matching Illinois state return. For businesses with operations or sales in multiple states, we also prepare multi-state returns and handle apportionment and nexus questions so you remain compliant everywhere you operate.

Can you help me choose the right business entity?

Yes. Entity selection drives your tax burden and personal liability. We analyze your revenue, ownership structure, and growth plans to recommend whether an LLC, S corp, or C corp is most advantageous, and we handle the election paperwork if a change makes sense.

Do you offer year-end tax planning for businesses?

Absolutely. Year-end planning is where the real savings happen. In the fourth quarter we review your books, project your tax liability, and identify actionable strategies, equipment depreciation, retirement contributions, owner distributions, and timing of income and expenses, before the tax year closes.

Business Taxes

Business Tax Preparation in Wheaton, IL

Business tax returns are about more than compliance, they are a checkpoint for strategy. DWK Tax & Accounting prepares federal and Illinois returns for LLCs, S corps, partnerships, and corporations across Wheaton and DuPage County, pairing accurate filing with year-end planning that lowers your liability and positions the business for growth.

Business Returns We Prepare

LLC tax returns (single and multi-member)

S corporation returns (Form 1120S)

Partnership returns (Form 1065)

C corporation returns (Form 1120)

Sole proprietor Schedule C filings

Illinois state business returns

Year-end tax planning and strategy

Estimated tax payment coordination

Multi-state business filings

Amended business returns

Filing Is the Floor, Planning Is the Value

Any preparer can enter numbers into a return. The difference is whether that return reflects a strategy, the right entity, the right depreciation method, and the right timing of income and expenses to minimize tax legally.

David Korzeniowski, CPA works with your books all year, not just at filing time. That continuity means your business return is built on accurate numbers and informed by the planning decisions made months earlier.

Related Services

S Corp Tax Preparation Small Business Accounting Bookkeeping

Serving DuPage County

CPA in Wheaton, IL CPA Serving Downers Grove, IL CPA Serving Carol Stream, IL

Why Choose DWK

A CPA Partner Who Invests in Your Success

Business owners choose DWK Tax & Accounting because they get direct access to a licensed CPA who understands their industry, their goals, and their numbers, not a revolving door of staff.

Licensed Illinois CPA

David Korzeniowski is a licensed Certified Public Accountant in the State of Illinois, not a seasonal tax preparer or a software dashboard. Every return is prepared and reviewed by a CPA who is accountable for accuracy and compliance.

Small Business Experience

8+ years working with contractors, restaurants, medical practices, law firms, e-commerce, real estate investors, and consultants across DuPage County. Industry-specific knowledge means better deductions and fewer surprises.

Year-Round Support

Tax strategy doesn't stop in April. David is available throughout the year for questions, planning conversations, and proactive adjustments, not just at filing season.

Proactive Tax Strategy

We plan ahead. Entity structure, timing, retirement contributions, and quarterly estimates are reviewed continuously so you keep more of what you earn, legally and strategically.

Personalized Planning

Every business is different. Recommendations are built around your specific circumstances, goals, and growth plans, never a generic template or a one-size-fits-all checklist.

Local & Accessible

Based in Wheaton, serving DuPage County and the western suburbs. You can call, email, or meet in person. No call centers, no overseas outsourcing, no account handoffs.

Meet David Korzeniowski, CPA Read Client Reviews View Success Stories

Frequently Asked Questions

Industries We Serve

Contractors & Trades Real Estate Investors Medical & Dental Practices

S Corp vs LLC in Illinois Top Tax Deductions for Small Businesses

Ready to Get Started

Take Control of Your Financial Future

Whether you need strategic tax planning, business advisory, or CFO-level financial leadership, DWK Tax & Accounting is ready to serve as a dedicated financial partner for your business.