Finding the last invoice number

Open the create invoice screen and subtract one from the invoice number shown in the upper right corner.

The simple answer is sometimes the easiest, but not always the best. Karl is right for many but not all cases. In some installations (as has been reported elsewhere) the default number shown on the screen isn't the correct next one in sequence. In multi user situations it might not always be the next one that would be assigned. Also, taking it a bit further - if you had entered a number out of sequence, such as going back to an older number, the next one that shows might not be what you want. ALSO - remember that you get different numbering sequences for each A/R account if you have several (which also affects my solution).

Karl's answer is the simplest and fits in many cases, my answer is a bit more complicated and time consuming but covers more bases.

Both work!

Go to Customer Center

Select Transactions Tab

Select Invoices

Click Num tab to sort by invoice #

Thank you, Karl And Russell!