我公司销售自行开发软件产品，如何享受软件产品增值税即征即退政策？

Group 1 - The core viewpoint of the article discusses the VAT policy for software products, specifically the immediate refund policy for VAT exceeding 3% for general taxpayers selling self-developed software at a 13% tax rate [5][6][13]. - General taxpayers can enjoy the VAT immediate refund policy when selling self-developed software products, provided they obtain the "Computer Software Copyright Registration Certificate" issued by the copyright administration [11][13]. - Imported software products that undergo localization modifications can also benefit from the VAT immediate refund policy when sold, but simple modifications like Chinese character processing do not qualify [8][10]. Group 2 - The article outlines the conditions required to enjoy the VAT immediate refund policy for software products, emphasizing the need for proper certification [11][13]. - It explains the calculation method for the VAT refund, which involves subtracting the current VAT payable from the sales amount multiplied by 3% [14]. - The article also highlights that certain conditions must be met for taxpayers to qualify for tax incentives, including obtaining necessary qualifications and documentation [31][33].