A tax calendar computed every day, the guide for anyone who just formed a company and the manual that explains the US tax system to newcomers. Made by CKO for its clients, open to everyone.
Every IRS, Florida DOR and Sunbiz date of the year, computed with the weekend and holiday rollover, filtered by company type, with a countdown to the next deadline.
The initial, one-time and annual obligations of a newly formed company, and how to recognize the private-company letters that look like they came from the government.
The American tax system explained for newcomers: income tax, annual report, 1099, FBAR, estimated tax, sales tax and payroll.
The guide CKO hands to every company it forms, summarized here. Every item has a deadline, and most have a penalty.
State and municipal licenses for the activity, before operating. Tangible Personal Property registration with the county when there is equipment. BOIR with FinCEN: since March 2025, companies formed in the US are exempt; foreign companies registered to do business here still file.
A 1099 for every contractor paid 600 dollars or more in the year, by January 31. Sales tax when taxable products or services are sold. Payroll and workers' comp from the first employee. Quarterly estimated tax once there is profit.
Annual Report on Sunbiz by May 1, with a 400 dollar penalty afterwards. The company's income tax return (1120-S, 1065 or 1120) and the owners' returns. Form 5472 for foreign-owned LLCs. License renewals and the Tangible Personal Property return by April 1.
Watch the mail. After formation, letters arrive from private companies offering registrations, certificates and "mandatory renewals", styled like government agencies, with fine print saying they are not. Much of what they offer is already in CKO's formation package. When in doubt, photograph it and send it on WhatsApp before paying.
The manual gathers what CKO explains every day at the office: how business and individual income tax work, what the annual report is, when to issue a 1099, who has to file an FBAR, how to calculate estimated tax, and how sales tax and payroll work in Florida.
Updated every year with the current deadlines and thresholds. The manual's deadlines feed the tax calendar on this site. Written in Portuguese, with English guidance on request.
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