Group 1 - The article discusses the consequences of failing to report unbilled income, which can lead to tax evasion charges and penalties ranging from 50% to five times the unpaid tax amount [2] - It outlines the process for general taxpayers to report unbilled income in the VAT declaration form, allowing for adjustments if invoices are later issued [2] - Small-scale taxpayers are also mentioned, indicating that they have specific guidelines for reporting their income [2] Group 2 - The article provides information on tax refunds for individuals selling their homes and purchasing new ones within a year, detailing the conditions under which tax can be refunded [8] - It explains that the refund amount depends on the comparison between the selling price of the old home and the buying price of the new home, with examples illustrating the calculation [8] - A reminder is included that the sale and purchase must occur within one year to qualify for the tax refund [8]