If you are interested in topical information about specific rules and regulations regarding financial reporting, then there are two particularly informative online sources to consider.
The first is the accounting standard-setters themselves, notably the International Accounting Standards Board (IASB), and, for the USA, the Financial Accounting Standards Board (FASB):
The second is the websites of the Big Four accounting firms:
Deloitte – www.deloitte.com
Ernst & Young – www.ey.com
KPMG – www.kpmg.com
PriceWaterhouseCoopers – www.pwc.com
which have a wealth of downloadable information.