Get every supplier invoice into one Gmail label for your bookkeeper

Help me get all my supplier invoices into one Gmail label.

My business: [what you do]
Regular suppliers and their sender addresses: [paste them]
How invoices usually arrive: [e.g. PDF attached, "Your invoice" in the subject]
Other bills by email: [e.g. phone, software, fuel cards]
Who needs them: [e.g. my bookkeeper every quarter]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A Gmail search string to test first, using from:, subject: and has:attachment or filename:pdf.
2. Filter rules that apply one label (e.g. Invoices) and, if I want, skip the inbox.
3. A second search to catch older invoices already in my inbox, using after: and before: dates.
4. A quarterly 5-minute routine for sending them to my bookkeeper.
5. A warning for anything the rules might miss.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts or figures. UK English.

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