Describe Sales and Purchase Vouchers in Tally ?

Sales Voucher

All the sales of the company, including cash sales are entered using this voucher.  This entry would appear in both Sales Register and Cash Book.  For this select the following:

Gateway of Tally>Accounting Vouchers>F8: Sales Voucher

Name of Buyer                     Dr            (Total Bill Amount)

Sales Account                       Cr                                                                              (Sale Amount)

Duty/Tax                               Cr                                                                              (Tax Amount)

Packing charges                   Cr                                                                              (Expenses Amount)

If you have set Yes to Allow Income Accounts in Sales Voucher under F12: Configuration in Accounting Voucher under Voucher Entry, then you can select Income Account also in second entry.

Purchase Voucher

All Purchase transactions are entered in Purchase Voucher, including Cash Purchase.

For this select the following:

Gateway of Tally>Accounting Vouchers>F9: Purchase Voucher

Here you have to remember that the first entry should always be a Credit involving any Creditor, or Debtor or Branch/Division, Cash or Bank Account and second entry should be a Debit to a Ledger placed under Purchase Account group.  Rest of Accounts may be any Revenue Account, except sales, or any Account under the Group Current Liabilities, other than Sundry Creditors.  Thus you can include Duties & Taxes or other billing terms from 3^rd entry onwards.

If you have set Yes to Allow Expenses/Fixed Assets in Purchase Voucher under F12: Configuration in Accounting Voucher, then you can select Ledger under Fixed Asset or Direct/Indirect Expenses also in second entry.