In a company account worksheet, I have income tax expense which I have to raise a liability for in the balance sheet, so I have to transfer loss including income tax expense to retained earnings, I then have to credit retained earnings with the amount of income tax expense (as it is undeductible). I have to also credit Sundry Creditors or Income Tax Payable with the tax expense but don't know what to debit to balance this entry. Please help.

There is usually a provision for income tax liability and an expense account called income tax.
The net income/loss acccount to cleared out to retained earnings

I don't understand the loss you are speaking about, if there is a loss then there is usually no income tax liability. A loss is when expenses exceed income whereas income tax is levied on a profit