Google Advanced Search allows you to search by domain name (on bottom line of the advanced search form).
Entering .edu or .gov into this line will only return results from educational or US government sites, which tend to contain more reliable scholarly or factual information. You will still have to evaluate the sites for authority, accuracy, currency, and objectivity.
The Financial Accounting Standards Board (FASB) has been the designated organization in the private sector for establishing standards of financial accounting that govern the preparation of financial reports by nongovernmental organizations. Those standards are officially recognized as authoritative by the Securities and Exchange Commission (SEC) and the American Institute of Certified Public Accountants.
The International Federation of Accountants (IFAC) is your one-stop access to high-quality resources and information developed by the International Federation of Accountants (IFAC) and other leading accountancy organizations from around the world. This search engine, powered by Google, provides access to a wide range of relevant materials to assist professional accountants in business, small- and medium-sized practitioners, auditors, accounting academics, and others in their day-to-day operations.
"The United States Tax Court is a court of record established by Congress under Article I of the U.S. Constitution. When the Commissioner of Internal Revenue has determined a tax deficiency, the taxpayer may dispute the deficiency in the Tax Court before paying any disputed amount." The Court website offers: