Your accountant is correct. You can pay the bare minimum throughout the year, and then pay up what you owe (if any) in April. Or you can pay more taxes throughout the year, and then (probably, very likely) receive a tax refund in April.
The amount of refund/taxes owned differs from individual to individual, from family to family. It is best if you look into what tax credits, benefits, tax brackets etc. apply to you and make an informed decision based on your circumstances. Your accountant might be of help in answering these questions as well.
