It seems that VISCO is posting Credit Memos to our Accounts Receivable Account. It should go to the same account as Invoice. These Credit Memos are being issued as new Invoices under Finance/Invoicing. They are not Sales Returns.

You need to check the GL Accounts Receivable Account and Invoice Account codes in VISCO. Also make sure your integrated accounting system has the exact same GL codes as VISCO. In VISCO, go to Tools, Accounting Administration to check the codes