1. EPOS V5 integration is having issue with their Service Charge setting which was group in their Tax Rules and when it synced to Xero, it was recorded as GST amount. Due to this, we are unable to use the Xero online F5 form for submission and will need to pass Manual Journal to adjust the GST amount and Taxable amount included Output Tax amount in F5 during GST submission. 2. There is no integration setup for PO Return from EPOS V5, Credit Note needs to be created manually in Xero to tally records in both system. 3. Manual Inventory Adjustment & Stock Takes created in EPOS V5 were synced to Xero as Bills to Pay instead of Manual Journal even though there is no Supplier invoice or Credit Note being issued. 4. And in Xero, when Sales Receipts synced from EPOS V5, the unit price is not displayed as per the synced record. EPOS V5 claim that this is an existing UI issues lied in Xero. 5. When Sales Receipts synced to Xero, GST will be re-computed and at times causing cents different in GST amount.