[foxylad]

We rolled our own VAT/GST handling. We use Stripe to bill the total amount, and generate our own invoices so we can break out the tax as an item. Doing our own tax and invoices means we're not locked in to Stripe, which is pretty good but will enshittify when they have enough of us in thrall. It also means you can do bank transfers which many customers prefer.

VAT/GST handling is not that complicated*, and our system spits out the numbers to fill in UK, AU, NZ and CA tax returns, which can all be done online.

*Except Canada... HERE BE DRAGONS! Each of the 13 provinces/territories has different rates and rules, despite the optimistically named "harmonised sales tax" (HST).