What service do you guys recommend to calculate sales tax if you are doing e-commerce?

Hi Indie Hackers Family!

What service do you guys recommend to calculate sales tax if you are doing e-commerce?

The only online sales tax service I know of is Avalara and is insanely expensive from what I have heard. Are there any good alternatives?

The thing is I already have an existing SAAS site integrated with Stripe for selling stuff, but now I am also looking at options for calculating sales tax as well since I might branch into selling physical merchandise as well

Thanks!