Can I get one invoice for everything?

Yes: lines, business names and locations of one group can combine onto a single monthly invoice, with per-line detail for your bookkeeping. Or the reverse: one invoice per business if the books are separate. The tier is computed on the whole — the $499 multi-line plan covers three lines, whether they belong to one or two businesses in your group. Every invoice carries what your books need, with no end-of-month surprises.