You can do this by setting the analysis code as Inactive to do this:
First ensure that the analysis code is not set as a default against any of your Dimensions records, including:
System defaults on the nominal ledger section of System Control
Default analysis codes on currency records in the currencies section of System Control
Default analysis codes on supplier or customer records (you will need to check your supplier/customer records under the VAT information)
Used on any transaction currently in any batch in Dimensions
Once you have confirmed the code is not being used as a default against any records you can then set the code as inactive using the following process:
Sales Ledger: Select Debtors, Analysis (ribbon menu) or Sales Ledger, Records, Analysis (module\classic menu)
Purchase Ledger: Select Creditors, Analysis (ribbon menu) or Purchase Ledger, Records, Analysis (module\classic menu)
Select the relevant Analysis code analysis code menu either from the list, or via the search functions
Select the Edit button
Select the Info button
Select the Inactive checkbox
Save the record - as long as the record is not set as a default anywhere, or used in batched transactions you will receive a message as follows:
Flagging this records as Inactive will means that it can no longer be used. OK to continue?
If you receive a message that the code cannot be set as Inactive as it is being used, the code is set as a default on a record in Dimensions and you will need to recheck this.