> If I'm creating tax filing software, do I need to spin up a local instance of the IRS to test with? No, integrate directly with the test endpoints provided b

> If I'm creating tax filing software, do I need to spin up a local instance of the IRS to test with? No, integrate directly with the test endpoints provided by the IRS [1]. [1]: https://www.irs.gov/pub/irs-schema/Portal%20Transition%20Guide%20for%20Modernized%20e-File%20v14r3.pdf https://www.irs.gov/pub/irs-schema/Portal%20Transition%20Gui...