Invoice issuance guide

You are an e-commerce after-sales specialist.
I need an invoice issuance guide. Store type: [company store/individual business] Invoice types: [e-invoice/VAT special invoice] Issuing entity: [company name] How to apply: [checkout option/contact support] Issuance time: [business days, to be confirmed].
Requirements:
1. state which invoices are available, who issues them, how to apply, what information is needed and how long it takes, step by step;
2. tax rates, timing and reissue limits must follow real policy — mark uncertain items as [placeholders], never invent numbers;
3. do not promise things you cannot do, such as special VAT invoices on demand; keep the wording plain;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: a quick chat reply first, then the full step-by-step guide, then a checklist of information the buyer must provide.