Feature requested
Quite a few of us use something like 20260504‑LF for an invoice reference
Typical use case
20260504LF is ok
20260504‑LF is not, but this is clearer.
The input validation on this box doesn’t make it clear that the dash is not allowed, it’s only when you click preview, after using 20260504‑LF several times, that you end up with an error.
1/ Please fix the input validation.
2/ Please allow dashes in invoice