How is the "Revenue (VAT deducted) tab" is calculated?

The calculation would be as follows:

Excluding VAT from gross sum: VAT calculation formula for VAT exclusion is the following: to calculate VAT having the gross amount you should divide the gross amount by 1 + VAT percentage (i.e. if it is 15%, then you should divide by 1.15), then subtract the gross amount, multiply by -1 and round to the closest value (including eurocents). The last two operations are not mandatory since you see the VAT value even before you do them.

It is also calculated based only on EU orders.