You can turn financial accounts into liability accounts by marking them as Credit Accounts. To do this, follow these steps:
Go to Settings and click Configure next to the account
Select Mark this as a credit card account and select This is a credit card account
Save your changes
To track loans for cash you've received, categorize the deposits as either:
Long Term Loans
Loans from Owners
Choose the most appropriate account. After saving, these amounts will show up under your Liabilities on your Balance Sheet (Reporting > Balance Sheet).