Morning: Small Business Tax Tips (New Haven)

New Haven, Connecticut | Jose’s Tax Service | August 15, 2026

Small business owners in New Haven should review tax records before the next major quarterly deadline. The third federal and Connecticut estimated tax payment is generally due September 15, 2026 for many sole proprietors, independent contractors, partners, and S corporation shareholders.

Use today’s practical checklist to improve recordkeeping, refine your tax strategy, and reduce the risk of avoidable penalties.

Category: News | Additional Category: Tax Planning | Tags: New Haven, small business tax tips, IRS, tax planning, tax strategy

1. Reconcile Your Books Before Calculating Tax!

Do not calculate estimated taxes from your bank balance. Use accurate accounting records and a current profit-and-loss statement.

Complete these steps:

1. Reconcile business bank and credit-card accounts.
2. Match payment processor deposits from platforms such as PayPal, Venmo, Stripe, and Square.
3. Separate business and personal transactions.
4. Review unpaid invoices and outstanding bills.
5. Confirm that inventory and cost of goods sold (COGS) are recorded correctly.
6. Update your mileage log and vehicle records.
7. Save digital copies of receipts and vendor invoices.

Your records should identify the date, amount, payee, payment method, and business purpose of each expense. Incomplete records can lead to missed deductions, inaccurate estimated payments, and delays during tax preparation.

The IRS Small Business and Self-Employed Tax Center provides official guidance on recordkeeping, deductible expenses, employment taxes, and business filing requirements. You can also review Jose’s Small Business Learning Center for bookkeeping checklists and business resources.

Practical reminder: Close your books through the most recent completed month before reviewing your September estimated tax payment.

2. Review Your Business Structure and Filing Forms!

Your federal tax forms depend on how your business is organized and taxed. Confirm that your records match your current structure.

Common federal filing requirements include:

• Sole proprietorship or single-member LLC: Report business income and expenses on Schedule C (Form 1040). Calculate self-employment tax on Schedule SE (Form 1040), when applicable.
• Partnership or multi-member LLC: File Form 1065, U.S. Return of Partnership Income, and provide each owner with Schedule K-1 (Form 1065).
• S corporation: File Form 1120-S, U.S. Income Tax Return for an S Corporation, and issue Schedule K-1 (Form 1120-S) to shareholders.
• C corporation: File Form 1120, U.S. Corporation Income Tax Return.

An entity classification change, new owner, payroll arrangement, or S corporation election may affect estimated taxes and reporting obligations. Do not assume that the filing process remains unchanged from the prior year.

Review the IRS business structures guidance and confirm your Connecticut obligations through the Connecticut business tax portal.

Practical reminder: Confirm the correct federal and Connecticut forms before making a payment or submitting an extension.

3. Recalculate Federal and Connecticut Estimated Taxes!

Business owners with income that is not subject to sufficient withholding may need to make quarterly estimated payments.

Use Form 1040-ES, Estimated Tax for Individuals, to calculate federal estimated tax. The form accounts for income tax, self-employment tax, withholding, deductions, credits, and prior payments. The IRS provides the current 2026 Form 1040-ES and instructions.

Complete the following review:

1. Project total 2026 business income.
2. Estimate deductible business expenses.
3. Include self-employment tax, when applicable.
4. Add income from wages, investments, rentals, or other sources.
5. Subtract federal withholding and payments already made.
6. Compare the result with prior-year tax and current-year projections.
7. Schedule the required payment before September 15, 2026.

Federal safe-harbor rules may reduce exposure to an underpayment penalty when the required payment levels are met. However, the correct calculation depends on filing status, adjusted gross income, withholding, credits, and payment timing.

Connecticut estimated tax is calculated separately. Review Form CT-1040ES, Estimated Connecticut Income Tax Payment Coupon for Individuals, and the current instructions issued by the Connecticut Department of Revenue Services (DRS).

A federal payment does not satisfy a separate Connecticut obligation. Pass-through entities and corporations may also have entity-level state requirements.

Warning: Late or insufficient estimated payments may result in interest or penalties. Payment should not be postponed until the annual return is filed.

4. Identify Legitimate Deductions: Do Not Manufacture Expenses!

A sound tax strategy begins with accurate classification. It does not begin with unnecessary spending.

Review these ordinary and necessary business expense categories:

• Advertising and marketing.
• Rent, utilities, and telecommunications.
• Business insurance.
• Accounting, legal, and professional fees.
• Payroll and employer-side payroll taxes.
• Contractor payments.
• Software and office supplies.
• Business travel and qualified meals.
• Vehicle expenses supported by mileage or actual-cost records.
• Home-office expenses, if the space is used exclusively and regularly for business.
• Depreciation and qualifying equipment purchases.
• Retirement plan contributions, when applicable.

A deduction reduces taxable income. It does not make an unnecessary purchase profitable. Evaluate the business purpose, timing, cash impact, and applicable limitations before purchasing equipment or accelerating expenses.

For major equipment purchases, review current rules for Section 179 and bonus depreciation. Federal limits and percentages can change. Confirm the current rules before making a year-end purchase decision.

Keep receipts, invoices, mileage logs, loan statements, and written business-purpose notes. Unsupported deductions can lead to additional tax, interest, penalties, or examination activity.

Practical reminder: Use a dedicated business account and retain documentation for every deduction claimed on Schedule C, Form 1065, Form 1120-S, or Form 1120.

5. Audit Payroll, Contractors, and Information Returns!

If you have employees, verify that payroll deposits, quarterly returns, and year-end reporting are coordinated.

Review the following:

• Confirm that employees complete Form W-4, Employee’s Withholding Certificate.
• Deposit federal payroll taxes on the required schedule.
• File Form 941, Employer’s Quarterly Federal Tax Return, when required.
• File Form 940, Employer’s Annual Federal Unemployment (FUTA) Tax Return, when applicable.
• Provide Form W-2, Wage and Tax Statement, to employees.
• Review contractor payments for potential Form 1099-NEC, Nonemployee Compensation reporting.
• Confirm Connecticut withholding and unemployment insurance obligations.

Worker classification must be reviewed carefully. An individual who performs services as an independent contractor should not automatically be treated as a contractor simply because the business issues invoices. Misclassification may create back-tax assessments, penalties, interest, and employment-related liabilities.

S corporation owners should also review whether shareholder-employees receive reasonable compensation through payroll. Salary and distributions require separate analysis and proper documentation.

Use the IRS guidance on independent contractors versus employees and employment taxes.

Practical reminder: Review payroll and contractor records before year-end. Correcting classification or missing information returns after the deadline can delay processing.

6. Verify Connecticut Sales and Use Tax Compliance!

A New Haven business that sells taxable goods or services may need a Connecticut Sales and Use Tax Permit. Registration is generally required for businesses selling, renting, or leasing goods; providing taxable services; or operating a lodging establishment.

Connecticut’s general sales and use tax rate is 6.35%, although special rates may apply to specific goods and services.

Complete these steps:

1. Register through myconneCT when registration is required.
2. Display the Sales and Use Tax Permit as directed by DRS.
3. Separate taxable and nontaxable sales.
4. Track sales made through online marketplaces.
5. Record purchases on which Connecticut sales tax was not charged.
6. File Form OS-114, Connecticut Sales and Use Tax Return, electronically.
7. File the return even when no sales or tax is due, if the business has an assigned filing obligation.

The Connecticut DRS Sales and Use Tax Information page provides current registration, rate, filing, payment, and use-tax requirements.

Failure to obtain a required permit or file a required return may lead to civil penalties and processing problems.

Practical reminder: Review your DRS filing frequency and upcoming Form OS-114 due dates before accepting additional Connecticut sales.

7. Schedule a Year-Round Tax Planning Review!

Daily tax planning is more effective than a last-minute filing review. New Haven business owners should analyze income, expenses, payroll, estimated payments, and compliance records throughout the year.

At your next review, prepare:

• Year-to-date profit-and-loss statement.
• Balance sheet, if maintained.
• Prior-year federal and Connecticut returns.
• Estimated payment confirmations.
• Payroll reports.
• Contractor payment records.
• Sales tax filings.
• Equipment and vehicle purchase information.
• Retirement and health insurance records.
• Questions about entity structure or future growth.

Jose’s Tax Service provides tax preparation, federal and state e-filing, bookkeeping support, business consultations, and year-round tax planning for New Haven small businesses and self-employed individuals. Review small business tax preparation services or schedule a tax appointment.

Deadline reminder: Review federal and Connecticut estimated tax requirements before September 15, 2026. Maintain payment confirmations with your 2026 business records.

This article provides general educational information. Tax obligations vary according to business structure, income, deductions, filing status, Connecticut residency, and applicable federal and state rules. Confirm current form instructions with the IRS, Connecticut DRS, or a qualified tax professional before filing or making a payment.