Expert guidance
Navigate complex federal and state tax compliance with confidence and precision.
Corporate tax services, strategically delivered.
Expert corporate tax preparation and filing for US businesses.
Navigate your tax obligations with confidence.
Professional. Strategic. Compliant. Expert guidance through federal and state tax compliance, maximizing tax efficiency for corporations of all sizes.
Our comprehensive corporate tax services provide businesses with expert guidance through the complex landscape of federal and state tax compliance. We specialize in maximizing tax efficiency while ensuring full regulatory compliance, helping corporations of all sizes navigate their tax obligations with confidence and precision. Schedule your consultation to discover how we can optimize your tax strategy.
Every major corporate return
Understanding and correctly filing corporate tax forms is crucial for maintaining good standing with tax authorities. Our team expertly handles all major corporate tax forms and ensures deadline compliance. Our bookkeeping services work seamlessly with tax preparation to maintain accurate financial records year-round.
- 01
Form 1120 — Corporation Income Tax Return
Standard corporate tax return for C corporations. We prepare comprehensive returns including all schedules and supporting documentation.
- 02
Form 1120-S — S Corporation Income Tax Return
Specialized return for S corporations with pass-through taxation. Includes Schedule K-1 preparation for shareholders.
- 03
Form 1065 — Partnership Return
Partnership tax returns with detailed partner allocation schedules and compliance reporting.
- 04
Form 990 — Exempt Organization Return
Tax-exempt organization filings including detailed public disclosure requirements and compliance monitoring.
- 05
Form 1041 — Estate & Trust Returns
Fiduciary tax returns for estates and trusts with specialized distribution calculations.
- 06
State corporate returns
Multi-state corporate tax returns with apportionment calculations and nexus analysis. Simplify compliance with our multi-state sales tax services.
Key corporate tax dates
Staying compliant with corporate tax obligations requires careful attention to deadlines and requirements throughout the tax year. Scale efficiently with an outsourced accounting team to ensure you never miss a deadline.
- January 31st
- W-2 and 1099 forms must be provided to employees and contractors. Information returns filed with tax authorities.
- March 15th
- S Corporation (Form 1120-S) and Partnership (Form 1065) returns due. Extensions available until September 15th.
- April 15th
- C Corporation (Form 1120) returns due for calendar-year corporations. Extensions available until October 15th.
- Quarterly
- Estimated tax payments for calendar-year C corporations are due on the 15th of April, June, September and December; individual estimates for pass-through owners fall in April, June, September and January.
- Year-round
- Ongoing payroll tax deposits, sales tax remittances, and state filing requirements based on business activities.
Planning and advisory beyond the return
Beyond basic tax return preparation, we provide strategic tax planning and advisory services designed to minimize your corporate tax burden while maintaining full compliance. Read our corporate finance insights for the latest tax strategies.
- 01
Strategic tax planning
We develop customized tax strategies that align with your business goals, including entity selection advice, transaction structuring, and long-term tax optimization planning. Our proactive approach helps identify opportunities for tax savings throughout the year.
- 02
Multi-state tax compliance
For businesses operating across state lines, we provide comprehensive multi-state tax services including nexus studies, apportionment analysis, and state-specific compliance requirements.
- 03
Tax controversy & audit support
When facing tax audits or disputes, our experienced team provides representation and support throughout the process. We handle correspondence with tax authorities, prepare audit responses, and work to achieve favorable resolutions. Contact us for immediate assistance.
- 04
International tax compliance
For corporations with international operations, we provide specialized services including transfer pricing studies, foreign tax credit optimization, and compliance with international reporting requirements such as Forms 5471, 8865, and FBAR filings.
Why choose our corporate tax services?
Our certified professionals deliver strategic tax planning and preparation services that protect your business interests while optimizing your tax position. Explore industry-specific solutions for manufacturers and retailers.
Tax optimization
Maximize tax efficiency while ensuring full regulatory compliance.
Current regulations
Stay current with ever-changing tax regulations for accurate, timely solutions.
See how much you could save
See how much you save by choosing ADYZER for your corporate tax needs. Compare costs between in-house staff and ADYZER's dedicated resources, and experience up to 70% savings while ensuring quality services.
$27,500$200,000
Your potential savings
$61,300
per year
Based on 1 selected service, compared with an in-house hire at an average salary of $77,500.
An estimate for illustration only. Your quote depends on your volume and scope.