How to edit prior year transferred data

I transferred a prior year tax data into my current year tax software (Premier Window version). I went back in the prior year software to correct an error (have not yet filled that prior year with IRS yet). How do I edit in the current software the prior year data I corrected? Do I need to delete all I entered in the current software and start over so that the correct prior year  software data can be transferred into the current year? Please advise. Thanks