How to properly organize document flow with foreign clients (Ukraine)?

Question

Electronic accounting

Good day I

started working with foreign clients in Ukraine. Opened FOP (FLP 3rd group simplified).
I send the client an invoice in English, which is the primary source for tax Ukraine and the bank.
For my part, you need to send a drawing in English with a signature. The essence of my question:
1. Is there a service with the ability to generate such a document?
2. There is a Ukrainian qualified electronic signature - can I sign it in some service?

Thanks in advance for the article or any advice in the direction of the search.
So far, nothing sensible has been googled)

Answer 1

you don’t need to google and turn to specialists (accountants, for example, with such a job), or find a consultant, you can even freelance.
As for the signature - what will the foreign client do with this signature?
signing is not a problem, there are services on the same ATsSK and programs of the same OPZ or whatever it is