You can't invoice tomorrow today. Invoices cannot be postponed, and VAT taxpayers should issue invoices when business occurs to confirm business income. Invoicing shall not be delayed or issued in advance, and the obligation to pay VAT shall occur on the day when the invoice is issued. The income realized last month should be invoiced in the last month, which needs to be timely. If you missed the invoice last month, you can make up the corresponding invoice this month.