Sandra,
Firstly put the VAT rate in a cell, say A1, as a percentage. For instance,
type 17.5% in A1
Then, do you want to add the VAT to an amount?
If so, assuming the amount is in B10, then in C10 add
=ROUND(B10*$A$1,2)
If you want to calculate the VAT in an amount?
Again, assuming the amount in B10, then in C10 add
=ROUND(B10-(B10/(1+A1)),2)

Signature
HTH
Bob Phillips
(replace somewhere in email address with gmail if mailing direct)
> Roger
>
[quoted text clipped - 25 lines]
> > > using the correct formulas for total, standard and vat. Can you please
> > > help