Domain
xl.tax
Two letters, on the one top-level domain that says exactly what the business does.
To every accountant, bookkeeper and tax adviser, XL is Excel. You inherit that association free — no explaining, no campaign to teach anyone what the name means.
.tax is not a workaround for a taken .com. The category sits in the domain itself, so the whole name is only four letters of signal: what it is, and what it is for.
Short enough to say once on a call and have it land. No hyphens, no substituted letters, no "that's with a Z". It survives radio, a business card, and a URL bar.
Enquiries from principals and brokers both welcome. Tell us who you are and what you have in mind — every serious offer gets a reply.
Email an offeror write directly to sales@xl.tax