Recording the amount is the easy half. What matters two years later is which rule you valued it under, who instructed it, and whether it has already been paid.
A spreadsheet records that a variation was worth one thousand pounds. It does not record that you valued it at contract rates under clause 5.6.1, that it carried two days of extension of time, and that loss and expense was not claimed.
That is the part you are asked for when the final account is disputed, and it is the part that is always missing.
Under JCT a variation is valued in the periodic valuation, not paid separately on the side. Keeping them apart is how retention on variations quietly goes missing.
Add Variations pulls every approved variation into the certificate as a normal line, so retention, progress and the statutory dates run down one track.
Yes, if that is what your contract does. Mark it Paid on the variation itself. If you later certify the same variation inside a valuation, QScope stops it counting twice rather than trusting you to remember.
Yes. A variation can be an addition, an omission or a substitution, and omissions carry through to the adjusted contract sum and the final account as negative figures.
It follows your contract. If a variation is certified inside a valuation, retention is deducted there once. If it is paid separately, you can set a retention rate on the variation itself, including zero for loss and expense which is normally not subject to retention.
Yes. Each variation prints on your letterhead with the description, the reason, the basis of valuation and the amount, ready to be issued as a confirmation of instruction.
Not your whole portfolio. One live job, one certificate. If it does not save you time the first time you use it, walk away and take your data with you.