determine how the disallowance of LIFO will impact U.S. multinational firms that report under IFRS.

To determine how the disallowance of LIFO (last-in, first-out) will impact U.S. multinational firms that report under the International Financial Reporting Standards (IFRS), you can follow these steps:

1. Understand the concept of LIFO: LIFO is an inventory accounting method where the most recently acquired or produced items are assumed to be sold first. When the cost of inventory is increasing over time, LIFO can result in lower taxable income due to the higher costs of more recent items sold.

2. Research IFRS and inventory accounting: IFRS is a set of accounting standards used by many countries around the world. Unlike U.S. Generally Accepted Accounting Principles (GAAP), IFRS does not allow the use of LIFO. Instead, it requires the use of other inventory valuation methods such as First-in, First-out (FIFO) or Weighted Average Cost.

3. Identify U.S. multinational firms reporting under IFRS: Look for U.S.-based companies that have chosen to adopt IFRS for their financial reporting purposes. Examine their annual reports or financial statements, where they disclose their accounting policies.

4. Analyze the potential impact: With the disallowance of LIFO, U.S. multinational firms reporting under IFRS will have to adopt alternative inventory valuation methods like FIFO or Weighted Average Cost. The impact can vary based on factors such as the specific industry, the price dynamics of the company's inventory, and the tax rules in different jurisdictions.

5. Consider the effects on financial statements and taxes: Compare the financial statements of U.S. multinational firms that have adopted IFRS and previously used LIFO with firms that use other inventory valuation methods. Analyze the potential consequences on the cost of goods sold (COGS), gross profit, net income, and tax liabilities.

6. Evaluate industry-specific implications: Some industries, such as those with volatile or rapidly changing inventory costs, may experience more significant impacts from the disallowance of LIFO. Higher COGS under FIFO or Weighted Average Cost can lead to reduced gross profit margins and potentially affect the financial performance and competitiveness of U.S. multinational firms.

By following these steps, you can determine the potential impact of disallowing LIFO on U.S. multinational firms that report under IFRS and gain a better understanding of how it may affect their financial statements and tax liabilities.