In QuickBooks, the most common issue when recording funds transfer between two accounts is duplication. To resolve this issue, we need to enter the transfers from your Checking account. Then, match it in your Gen account.
Go to the Banking page, then select the bank account to transfer from (checking account).
Locate and select the transaction to open it.
Choose the Record transfer radio button and select the other account from the Select transfer account drop-down list (Gen account), then select Record transfer.
Choose the bank account to which you transferred the transaction (Gen account), then select the Recognise tab and find the transaction. The Category/Match column should indicate a match was found.