Creating a new referral - is 'estimated deal value' the ACV or TCV?

When creating a referral in Partner Centre, there is a 'Estimated value' to add in the deal details section.

It is not clear is this is supposed to be the annualised contract value, or the total contract value of the full term and including one-off charges.

I have looked here https://learn.microsoft.com/en-gb/partner-center/referrals/manage-co-sell-opportunities#add-deal-details and at various other pages and searched, and it is not clearly stated. 

Please advise, and ideally please update the docs and maybe put a small 'info' icon next to 'Estimated value' to help others and so that it is clear what is expected here, not left to guess and peoples opinions about what should or shouldn't go in there.