You said in your lecture that year-end that if we wrongly estimate the accruals by underestimate then we need to charge more expense at the first day of next year.
The double entry would be: DR Telephone expense CR Accruals
However if we wrongly overestimate the accruals then we need to reverse the accrual at the first day of next year.
The double entry would be: DR Accruals CR Telephone expense