Yes, you can start the numbering of your documents wherever you want. For that, you have to change a number manually by editing the Overview panel of the document concerned. You can define any pattern you want (adding the year, for example) and the system will increment this number for your next documents.
Please note that the system increments the last part of the number. If you define 2023-035, it will name the next invoice 2023-036. But if you define 035-2023, it will increment it to 035-2024, so make sure the number to be incremented is at the end.
Also, if you change an invoice number to add the name of the client in it (e.g. Babel Translations - 2023-035), please note that the system will keep the name of this client in the next invoices you create, even if they concern other clients (because it only increments the number).
If the system keeps generating invoices with the same number, see this article: https://help.lsp.expert/en/articles/3857836-the-system-doesn-t-increment-my-invoice-numbers-correctly-why-is-that.