Re: Sharepoint list

louisquinet this isn't possible with SharePoint on its own because you would need 3 calculated columns (to be populated if the value of the first column is A),  but you can't manually add data into a calculated column (it the first column is anything other than A). So you'll need to have 3 single line of text columns and then use a flow in Power Automate to check if the first column has changed and if it has, if the first column is A then populate the other 3 columns, otherwise don't take any action so you can enter the data into those columns manually.

Rob
Los Gallardos
Microsoft Power Automate Community Super User.
Principal Consultant, SharePoint and Power Platform WSP Global (and classic 1967 Morris Traveller driver)