Corporate and business tax
Federal and Florida business tax returns for corporations, S corporations, partnerships and LLCs, prepared in Boca Raton in English or Spanish.
In short
MTroncone CPA prepares federal and Florida tax returns for corporations, S corporations, partnerships and LLCs, and the information returns foreign owners need, such as Forms 5472, 8804 and 8805. We also help you choose or review the structure of the business and plan the year, so the return reflects decisions made in time. Work is available in English or Spanish.
Who it is for
- Florida corporations, S corporations and multi-member LLCs that file a federal business return
- Owners deciding between an LLC, an S election or a corporation
- Foreign owners of a U.S. corporation or single-member LLC that must file Form 5472
- U.S. partnerships with income allocable to foreign partners
- Growing companies that want tax planning during the year, not only at filing time
What we do
- Federal business returns: Form 1120 for corporations, Form 1120-S for S corporations and Form 1065 for partnerships and multi-member LLCs
- The Florida corporate income tax return (Form F-1120) when the business is required to file
- Form 5472 for foreign-owned U.S. corporations and foreign-owned single-member LLCs
- Forms 8804 and 8805 for partnerships with income allocable to foreign partners
- Business entity setup and analysis, including whether an S election (Form 2553) fits before you decide
- Tax planning during the year, from estimated payments to the decisions that change the return
- Extensions on Form 7004 when the books need more time, coordinated with your bookkeeping
How it works
Four steps, in English or Spanish.
- 01
Review
We look at last year's return, the entity documents and how the business is owned.
- 02
Close the books
We confirm the books are closed for the year, or close them with you.
- 03
Prepare and explain
We prepare the federal and Florida returns and the information returns that apply, and walk you through them before you sign.
- 04
File and plan ahead
We file, keep your copies in the client portal and set the dates for next year's estimated payments.
What to bring
- Prior-year federal and Florida business returns
- Year-end financial statements, or access to your accounting software
- Articles of organization or incorporation, the EIN letter and any S election acceptance letter
- Ownership details for every owner, including country of residence
- Records of transactions with foreign owners or related companies, for Form 5472
- Estimated tax payments made during the year
Dates to know
General federal dates for calendar-year filers, checked on irs.gov on Oct 3, 2026. Your own dates may differ; the team confirms them for your case.
| Date | What is due | Source |
|---|---|---|
| Upcoming | 2025 Form 1120 for calendar-year corporations that requested the automatic 6-month extension. | irs.gov |
| Upcoming | corporations deposit the fourth installment of 2026 estimated income tax. | irs.gov |
| Upcoming | 2026 Form 1120-S for calendar-year S corporations, and 2026 Forms 8804 and 8805 for calendar-year partnerships (15th day of the third month).Date derived from the IRS rule and the 2027 calendar; confirm against Publication 509 (2027) when the IRS publishes it. | irs.gov |
| Upcoming | 2026 Form 1120 for calendar-year corporations (15th day of the fourth month), with Form 5472 attached when it applies.Date derived from the IRS rule and the 2027 calendar; confirm against Publication 509 (2027) when the IRS publishes it. | irs.gov |
Frequently asked questions
When is a business tax return due?
It depends on the entity. For calendar-year businesses, partnerships (Form 1065) and S corporations (Form 1120-S) are generally due on the 15th day of the third month after year end, and corporations (Form 1120) on the 15th day of the fourth month. Form 7004 requests more time to file.
Does a single-member LLC owned by a foreign person have to file anything?
Generally, yes. For Form 5472 purposes the IRS treats a foreign-owned U.S. single-member LLC as a corporation, so it files a pro forma Form 1120 with Form 5472 attached when it has reportable transactions with related parties. We confirm what applies to your company.
Should my LLC elect S corporation status?
It depends on ownership, profit and how the owners are paid. An S election brings payroll for owners who work in the business and limits on who can own shares, including no nonresident alien shareholders. We compare the options with your numbers before Form 2553 is filed.
Do you prepare Florida corporate tax returns?
Yes. Florida has a corporate income tax, and whether your business must file Form F-1120 depends on how it is taxed at the federal level. We confirm it and prepare the Florida return together with the federal one.
Can you work with a business whose owners live abroad?
Yes. We meet by video, exchange documents through the client portal and prepare the U.S. returns and information returns the company needs, in English or Spanish.
Related guides
General information on the same topic, with links to the official sources.
S corp vs LLC in Florida: how the entity and the election fit
One is a legal entity you form with the State of Florida. The other is a tax status you request from the IRS. Here is how they relate, who can use each, and the dates that matter.
Year-end tax checklist for small business owners: 2026
Seven areas to close before December 31, 2026, and the federal dates that follow. Several January deadlines move to Monday, February 1, 2027, because January 31 falls on a Sunday.
Talk about this year's business return
Tell us the entity, the owners and the tax year, and we will tell you what we need to get started.
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