Individual : All individual earning US source income are liable to pay tax in US whether resident or non resident. The different type of taxes applicable in US are federal Income tax, state income tax, social security and medicare taxes, capital gain tax, gift tax etc. An individual can file their tax return on different filing status as single, Married filing jointly , Married filing separately, head of household depending upon criteria. Federal income tax returns are typically due on April 15th of each year, unless that date falls on a weekend or holiday.

State income tax deadlines vary by state but often align with the federal deadline. The current Form 1040 has three versions: Form 1040(US Residents), Form 1040-SR (for seniors), and Form 1040-NR (for non-resident aliens).

Business : Business taxation in the United States is a complex and multifaceted system that varies based on the type of business entity and the income it generates. The primary forms of business entities in the US include sole proprietorships, partnerships, limited liability companies (LLCs),
S corporations, and C corporations.

Sole proprietors report business income and expenses on their individual tax returns (Form 1040) and file their tax return by April, 15th of each year. LLCs and Partnerships are "pass-through" entities, meaning they do not pay federal income tax at the entity level. Partnerships must file Form 1065 with the IRS by March 15th of each year. Instead, profits and losses are passed through to the individual partners, who report their share of the income on their personal tax returns. However, an LLC can elect to be taxed as a corporation (either as an S corporation or a C corporation) if it meets certain requirements.

S corporations are pass-through entities. Profits and losses are passed through to individual shareholders, who report their share of income on their personal tax returns (Form 1040). S corporations must file Form 1120S to report their income and expenses to the IRS by March 15th of each year.

C corporation are separate legal entity from its shareholder. C corporations pay federal income tax on their profits at the corporate level and are generally subjected to two levels of tax on their income — corporate and personal. C corporations file Form 1120 to report their income and expenses to the IRS by April 15th of each year.

Other deadlines for businesses

Employment Tax Deadlines :

• Employment tax deposits : Businesses must deposit employment taxes (e.g., federal income tax withheld, Social Security and Medicare taxes) either monthly or semi-weekly, depending on their payroll size.

• Employment tax returns (Form 941): Employers must file Form 941, the Employer's Quarterly Federal Tax Return, by the last day of the month following the end of each calendar quarter.

Information Return Deadlines :

• Form W-2 : Employers are required to provide Form W-2 to employees by January 31st each year and to file copies of Form W-2 with the Social Security Administration (SSA) and IRS by January 31 st of each year.

• Form 1099 : Businesses must provide Form 1099 to payees and file copies with the IRS by January 31st for most types of payments.

Estimated Tax payment : Businesses that expect to owe at least $1,000 in taxes for the year are generally required to make estimated tax payments throughout the year.

• First Quarter Deadline : April 15- Covers income received from January 1 to March 31

• Second Quarter Deadline : June 15- Covers income received from April 1 to May 31.

• Third Quarter Deadline : September 15- Covers income received from June 1 to August 31.

• Fourth Quarter Deadline : January 1st of following year- Covers income received from September 1 to December 31 of the current year.

Delaware reporting deadline : The due date for filing the annual report varies depending on your business entity type:

• For corporations, the annual report and payment of franchise tax is typically due by March 1st.

• For LLCs, the payment of annual tax is generally due by June 1st. There is no requirement to file an Annual Report.

• Failure to file the annual report and pay the required franchise tax will result in a penalty of $200.00 plus 1.5% interest per month on tax and penalty.