How do I manually enter taxes in payables and receivable. Also how do I manually enter accounts in Sales invoices in Quick books

When entering purchases, including payables, you don't need to enter the sales tax. You include the sales tax paid with the expense account used for the purchase.

In QuickBooks, you do not enter general ledger accounts in invoices - you only enter items. In the Items list (Lists menu > Item list) you link each item to a General Ledger account.

If you want to see how an existing invoice affects the General Ledger, open the invoice and press Ctrl+Y.