Can anyone let me know how i can get a copy of my 2014 state tax return

TurboTax only retains tax returns for the prior 7 years, the same retention period as the IRS.  So the 2014 tax return is no longer available.

You may be able to get a transcript from the IRS for the 2014 return.  You will need to request a Tax Account Transcript using Form 4506-T from this IRS website - https://www.irs.gov/pub/irs-pdf/f4506t.pdf

For a state tax return you will need to contact your state department of revenue for assistance - https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/contact-state-department-revenue/L9qVToi02_US_en_US?uid=lnkxweic

the IRS probably won't have a transcript either since it also only retains returns for so many years. also it will only be a federal transcript no state info.