The revenue accounts and the expense accounts make up the majority of the nominal accounts. (These accounts are also referred to as temporary accounts.)

The revenue accounts normally have a credit balance, so to close the revenue accounts you will need to debit each revenue account. For example is Sales has a credit balance of 20,000,000 then you need to debit the account for 20,000,000. The credit might go to another temporary account, Income Summary.

The expense accounts will likely have debit balances, so to close the expense accounts you will ned to credit each expense account for its balance. The debit might also go to Income Summary.

After all of the revenue and expense accounts are closed, you close the Income Summary account. If the balance is a credit, you would debit Income Summary and would credit Owner's Capital (if a sole proprietorship) or Stockholders' Equity (if a corporation). The owner's capital account and the corporation's Retained Earnings account are real or permanent, balance sheet accounts.