Your FI or bank controls how far back you can download. Most only go back 90 days. The rest you will have to enter manually. You might get a greater range of transactions if you go to your financial institution's website and download a different range of dates in a Web Connect .QFX file. If you manually enter older transactions, be sure to adjust the opening balance to account for them as you enter them.
See this FAQ
https://community.quicken.com/discussion/7160091/faq-download-old-transactions