Credits or discounts on invoices

I totally hear ya on the current set-up not being ideal, but I promise discounts are very close to being live (we're talking days or a few weeks if everything runs smoothly), Once they are live it will be super easy to simply mark a lesson as 100% discount on the next invoice. 

Now I've got the full picture for the vouchers, the simplest way to do this until discounts are live is to essentially reduce the invoice amount for the parents, for example by editing the item price to subtract $100, or you can even save it as an item with it already subtracted. You can include a note saying something along the lines of "$100 government voucher already subtracted from total". Once we've got discounts up and running, this should be a bit simpler as well. 

Then when the government reimbursement hits your account, you can categorise that accordingly within Solo. If you’re using Connected Accounts or a Solo Money bank account, Solo’s smart matching will start to recognise how you categorise these and suggest the same category next time.

Hope this helps in the meantime while we wait for discounts to land, but let me know if there's anything else I can help you out with or clarify!