This is only applicable if you collect sales tax on the products you sell. If you collect sales tax, you must keep detailed sales tax records (by law).

You will need to add a Sales Tax account in the general ledger.

When you make a sale and charge sales tax, only the net amount (before sales tax) is Credited to sales. The sales tax element should be Credited to the Sales Tax account (a liability).

At the Sales Tax period-end date, the Sales Tax account should be closed off and the Sales Tax payment due will be the balance (this is what you will pay to the taxing authority). This payment is Dr to the Sales Tax liability account to make the balance zero.