Anrok is great! Anrok generates and files US returns. We still have to file EU OSS returns quarterly (based on the Reports created by Anrok), but it's manageable. Stay far away from Avalara... it's unusable and the contracts are predatory IMO. Filing UK VAT has been a mess.

I'm @ a US-SaaS company using Stripe and Quickbooks.

How does Anrok charge? is it based on a per filing basis or %age of rev? If %age can you share broadly speaking what it costs?