After you file

"trouble accessing"
But didn't say exactly what the trouble is.

How did you prepare the prior returns?  In online TurboTax?   If so, have you located them in your account?  If so, when you try to print/download, does it say access is locked and asks you to pay?

Or were they prepared online, but you can't find them in your account?

Which tax year of CD Deluxe did you buy?  2018 or an earlier year?    A 2018 Deluxe CD purchase qualifies to unlock prior online returns, but would require a call to Customer Support.  We can tell you more when you answer all the questions above.

If the prior returns were prepared in desktop software, then you are the only one who could have saved a copy of them.