Welcome to our Resources page

Here you will find helpful tools, links, and information on U.S. tax and related international tax matters.

We have gathered useful IRS links, tax treaty resources, calculators, maps, and other materials to support your tax needs. These resources are organized into clear categories to make them easy to find and use.

Sr. No.Name of the ResourceRelated Link
1 Sales Tax Rates & Economic Nexus Thresholds by State

The following page contains the current sales tax rate and economic nexus threshold for each U.S. state

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2 U.S. Tax Treaties with Other Countries

The following page contains the list of tax treaties that U.S. has entered with other countries

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3 How to Make Payments to the IRS

Main website for all IRS payment options, including Direct Pay, credit/debit cards, and payment plans.

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4 EFTPS: The Electronic Federal Tax Payment System

IRS Payment system for businesses

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5 Direct Pay with bank account

Free, secure way to pay from a checking or savings account (no sign-in required for basic use)

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6 Pay your taxes by debit or credit card or digital wallet

Option to make payment via authorized processors

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7 Apply online for a payment plan

Apply for a payment plan to pay over time.

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8 Substantial Presence Test Calculator

The following page contains a Substantial Presence Test Calculator. It helps determine whether you meet the U.S. Substantial Presence Test based on your days of physical presence in the United States during the current year and the two preceding years.

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Disclaimer: The information and resources on this page are for general informational purposes only. They were collected from public websites and official sources. This does not constitute legal or tax advice. Tax laws change frequently. Please consult a qualified tax expert for guidance specific to your situation.