Unidata might be a bit more popular than TaxJar. We know about 1 link to it since March 2021 and only 1 link to TaxJar. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
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: almost 2 years ago
Not exactly a search tool, but this project crawls and aggregates web3 data from multi-chains pretty effectively. You can try out its data tool unidata. https://unidata.app/. Source: about 2 years ago
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