享受研发费用加计扣除政策，需要到税务机关办理什么手续
http://file.tax100.com/o/202308/21/684_1692566704445.gif?width=520&size=3341949来源：国家税务总局长春市税务局
http://file.tax100.com/o/202308/21/444_1692566705053.png?width=1080&size=275375
http://file.tax100.com/o/202308/21/647_1692566705345.gif?width=856&size=8626317
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