Books, returns, payroll and sales tax for US businesses and the CPA firms that serve them.
Our services in United States
Filed with the Internal Revenue Service and state revenue departments, reviewed twice before submission.
Bookkeeping and monthly close
QuickBooks Online, Xero, NetSuite and Sage Intacct cleanups, monthly close and US GAAP reporting.
Business and individual tax returns
Forms 1040, 1065, 1120, 1120-S and 1041, plus state filings and extensions.
Payroll and year-end forms
Gusto, ADP and Paychex payroll, IRS and state compliance, W-2 and 1099 filing.
Multi-state sales tax
Nexus analysis, registrations, return filing and reconciliation for e-commerce and SaaS.
White-label support for CPA firms
Workpapers and return preparation delivered review-ready under your firm’s name.
Audit and review support
Audit-ready books, supporting schedules and PBC lists for faster fieldwork.
Tax due dates in United States
Every fixed deadline over the next twelve months, counted from today, 30 September 2026.
Extended 1040 and 1120 returns
15 October 2026. Filers who extended in April.
The year ahead
Each marker is a deadline. Select one to see what’s due.
- Income taxin 15 days
Extended 1040 and 1120 returns
Filers who extended in April
- Payrollin 31 days
Form 941 for Q3
Employers
- Business taxin 76 days
Q4 estimated tax for corporations
Calendar-year C corporations
- Income taxin 107 days
Q4 estimated tax payment
Individuals and self-employed
- Payrollin 123 days
W-2 and 1099-NEC filing and furnishing
Employers and payers
- Payrollin 123 days
Form 941 for Q4 and annual Form 940
Employers
- Business taxin 166 days
Partnership (1065) and S corporation (1120-S) returns
Calendar-year entities
- Income taxin 197 days
Individual (1040) and C corporation (1120) returns
Calendar-year filers; extension requests due the same day
- Income taxin 197 days
Q1 estimated tax payment
Individuals and corporations
- Payrollin 212 days
Form 941 for Q1
Employers
- Income taxin 258 days
Q2 estimated tax payment
Individuals and corporations
- Payrollin 304 days
Form 941 for Q2
Employers
- Business taxin 350 days
Extended 1065 and 1120-S returns, Q3 estimated tax
Calendar-year entities and individuals
Rolling deadlines
These repeat every period, so the exact date depends on your filing frequency.
Dates assume calendar-year filers. When a date falls on a weekend or federal holiday, it moves to the next business day. Deadlines can change by official notice, so confirm with the Internal Revenue Service and state revenue departments or ask us. Last reviewed September 2026.
Quick answers for United States
In United States we provide bookkeeping and monthly close, business and individual tax returns, payroll and year-end forms, multi-state sales tax, white-label support for cpa firms, audit and review support.
We file with the Internal Revenue Service and state revenue departments and prepare financial statements under US GAAP.
Extended 1040 and 1120 returns, due on 15 October 2026. It applies to: filers who extended in april. Rolling deadlines such as Sales tax returns depend on your filing frequency.
We work inside QuickBooks Online, Xero, NetSuite, Sage Intacct, Gusto, ADP, Paychex, Microsoft Excel, using your own logins and VPN-only access.
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Never miss a deadline in US.
We keep your IRS calendar, prepare every filing and tell you what’s due before it’s due.