Hi @SSA 

Thank you for reaching out to the Klaviyo Community 
Can you please provide more information on what you mean by ‘mark flows as transactional’ so I can try and assist you.

Look forward to hearing form you

Kylie

Hi Kylie

i have transactional emails such as order confirmation and shipping updates that are not being sent due to a profile unsubscribing from our newsletters.

im trying to have these emails marked as transactional so that they are not skipped for unsubscribed profiles. 
 
thanks! 

Thanks @SSA 

Are you using Shopify by any chance?
If so, you can create your transactional emails in Klaviyo and then export the code and import into Shopify.

Back to your main question - if you want to mark emails as Transactional and your 60days support has expired on the free account, you need to upgrade your plan to submit this request.
Here is a Klaviyo Article to refer to for more information: https://help.klaviyo.com/hc/en-us/articles/360003165732

Hope this provides clarification

Kylie