Hi, I have mistakenly categorised misc expenses to fixed assets for the last year and need to recode these in order to remove the depreciation that should not be on those items, any advice as when I try to edit it will not allow as vat returns have been filled

Hi, 
So you can do the following. 
Go to tax, click on the VAT period and on the right mark as Unpaid. 
That will unlock it.
Then you can make the category edits and save the bills, don’t alter the amounts.
Then go click on the VAT period and on the right mark as paid. 
That will lock it.
Hope that helps
Pete