UsTaxes.org VS TaxJar

There is https://ustaxes.org , an open-source tax filing application, but I'm not adventurous enough to use it when a mistake could be very expensive. - Source: Hacker News / about 2 years ago

The ustaxes.org site generates all the results on your computer or mobile with no data exchanged with our servers. If you like you can also download a desktop build of it at github.com/ustaxes/releases. Source: about 2 years ago

I'm working with other contributors on https://ustaxes.org, an open source tax filing webapp https://github.com/ustaxes/UsTaxes. Currently, many Federal tax forms are supported, as well as tax filing for the state of Illinois. Filing for Oregon and California is under development! - Source: Hacker News / about 2 years ago

There are a couple of open source projects like http://opentaxsolver.sourceforge.net/ and https://ustaxes.org/ ; perhaps we should support these to get to the point where they can actually replace TurboTax and H&R. I bet the laws are unnecessarily complicated and they probably continue to get more complicated due to Intuit's lobbying but opposing that is a much more expensive proposition than supporting an open... - Source: Hacker News / about 2 years ago

Since https://ustaxes.org, a FOSS tax filing website was last posted here, the project has gotten lots of contributions from the community! Here are some of the new features that have been added by contributors. Source: over 2 years ago

Might want to check out taxjar.com, I haven't used it but one thing they claim to do is help with this compliance. Source: over 1 year ago