Supply of services are taxable on the date invoice ought to have been issued or receipt of advance whichever is earlier.
Supply of goods are taxable only on the date, invoice ought to have been issued and not on receipt of advances.
TAX INVOICE
Supply of Goods:
Tax Invoice shall be issued at the time of removal if there is movement of goods
Tax Invoice shall be issued at the time of delivery if there is no movement.
Tax Invoice shall be issued within 6 months from the date of removal if supply is made on sale on approval basis.
Thus supply of goods shall be taxable on the date of issue of invoice.
Supply of Services:
Tax Invoice should have been issued within 45 days of supply of banking and insurance services.
Tax Invoice should have been issued within 30 days of supply of other services.
Thus supply of services shall be taxable on the date of issue of invoice.
However, if tax invoice is not issued within the time mentioned above, the supply of goods / services shall still be taxable on the date invoice ought to have been issued.