Please note that 3rd party tax companies such as Sprintax are legally required to store your information for a period of only 3 years.
If you wish to obtain your previous Federal tax records that are more than 3 years old, you can request a transcript from the IRS here: https://www.irs.gov/individuals/get-transcript
As for your previous State tax records you can Google search "Get transcript + the name of the US state that you filed for" and you should be directed to the relevant page.
Important: Do note that it's recommended to always keep a copy of your tax return(s) saved on your device or printed and stored as a hard copy.