I think you misunderstand the purpose of the liability account. I would suggest you review the standard accounting model, but to give you a brief overview:
Income and expenses are money coming into and out of your possession. They are the pipes flowing into and out of your "box". Inside your box, you have assets (bank, savings, cash, etc) and liabilities (credit cards, unpaid debts, etc). Money can flow into and out of either asset or liability accounts, for example: deposit a payment (income to asset), buy office supplies with cash (asset to expense), pay a bill with credit card (liability to expense), customer pays one of your debts directly (income to liability). Paying off a debt with an asset does not affect your overall net worth, so paying a check to your credit card bill (asset to liability) doesn't decrease your total balance, it merely moves the value from one bucket to another.
Now to your question:
Mandatory payments, such as taxes or insurance (or for that matter, utilities, rent, food- all things that "must" be bought occasionally) are not liabilities, instead they are all expenses. They might be paid FROM a liability account, if they are paid on credit for example, but the money still flows from liability to expense. In my own records I have Expense:Taxes and Expense:Insurance, with sub-accounts in each. Where the money comes from depends entirely on how I pay my bills, whether from cash or banks (asset) or whether it's a charge (liability). Sometimes you receive payments back from an insurance company. I find that rather than treating insurance premiums as a positive balance in a liability (with eventual payments as debits to the liability account), it is better to treat any payment from the insurance as income.
Hope that helps!