It's possible to import bank transactions easily from the Bank screen, by adding a "Credit card" account, and uploading your transactions from the past.
1- export your previous bank transactions from your bank app
Export all your banking data from your bank account, in .PDF or .CSV format
2- Create a new "Credit card" account
First, connect to the Bank screen on Accountable web.
From this screen, click +Add > credit card
3- Import your bank transactions
From the next screen, you can update, add, or delete a transaction
After you confirm, transactions will be visible like a normal bank account