You can try Brightpearl (aff link).
It's quite complex, but will surely lift up your business processes to the next level. I personally use it for my store Alisa.ua. Combined with powerful automations you can build on top of it, it's a great way to grow your e-commerce business.
Hi Lise, I love your store, I have two cats, your products are so cute!!
I only sell in Australia at the moment, also, I'm trying to work out if I need a separate inventory tool or whether there is an option that combines inventory tracking & accounting.
Stas, thanks for the info, I looked at Brightpearl but thought it looked a bit expensive and is probably more than I need right now!