How can I import investment transactions from an account that does not interface with Quicken

I use Quicken Subscription. My investment advisor is changing the investment custodian from TDAmeritrade, from which I can import transactions just fine, to another custodian that does not interface with Quicken. How can I import the transactions from the new custodian account? Can I have a CSV or another file type created by the investment advisor for me to download and then import?