Q. Need for adjusting entries?

The income statement of business information all revenues earned and all expenses incurred to generate those revenues during a given period. An income statement that doesn't report all revenues and expenses is inaccurate, incomplete and possibly misleading. Likewise a balance sheet that doesn't report all of an entity's assets and liabilities and stockholders' equity at a specific time may be misleading. Every adjusting entry has a dual purpose to make the income statement reports the proper revenue or expense and to make the balance sheet report the proper asset or liability. Therefore every adjusting entry affects at least one income statement account and one balance sheet account.