If you're trying to create an overdraft account for your bank, it is considered a current liability which is generally expected to be paid within months. In some cases, businesses treat a bank overdraft in the balance sheet as an asset or an expense, if you're going to pay back and reverse the overdraft quickly.
To create the account, here's how:
Go to Accounting> Chart of Accounts.
Select New.
From the Account Type drop-down menu, choose Other Current Liabilities.
From the Detail Type drop-down menu, select Line of Credit.
(Optional) Change the account name.
Hit Save and Close.
Here's a sample screenshot for a visual reference: