bit of a novice and also on a mac, i hope the xlsx is good.
this is the local legion membership list, columns J and K show branch and club joining date ( should be same but can differ )
I want to upload data to epos to give current members 10% off beer ( good hey )
How do i alter "J" from 11/02/1994 to 11/02/2020
then column "K" to be expiry date 12 months on 11/02/2021
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