Bring one open month, or a clear sentence about why the month is open. A weekend of two invoices, a payday with no company, a notice about a year that never closed, or a first room that was sold before the accounts existed. Any one of those is enough.
We do not use the call to read a script at you. We use it to learn which of those troubles is actually yours. If the trouble is smaller than a month of work, we will say that. If it is larger, we will say what the first month would include.
You can also use the form on this page if picking a time is the hard part. The form and the calendar reach the same practice. The phone in the footer is the third door, and it is a real phone.