For those of us that are used to working as contractors that isn't an issue, as we already have accountants and are used to making invoices every month. But I understand it can be daunting if you don't have all of that in place, yet.
An accountant isn’t necessary for something like this, plans like Zoho books free or harvest take care of the same things an accountant would take care of.
Parent said "accountant AND...". You need the accountant to provide advice so you don't do illegal things or run afoul of tax authorities, not to generate an invoice.
Aren't there subtleties, for example, when doing inter-state commerce (assuming the two parties are both US-based)? In the EU, VAT isn't charged the same way if you invoice an entity based in your country or one based outside of it.
