Journals are under “reports” in QuickFile, which I agree isn’t the most obvious place to find them. Essentially a journal is simply a way to move money around any of your nominal accounts, the only condition is that the total debit and total credit amounts on the journal must be equal.
If you go to reports -> chart of accounts, and expand out the “assets and liabilities” section, you should find that each of your default asset codes has an associated depreciation code:
and under overheads there may also be another set of matching codes (I have had my QuickFile account a long time, I’m not sure whether more recent accounts get the full set of default nominals that were in place when I first set mine up).
The way depreciation works it effectively moves a portion of the asset value off your balance sheet each year and puts that value into that year’s P&L as an expense. All you need to do once you know how much depreciation you want to record, is create a new journal (reports -> journals) that does a credit to the “assets & liabilities” depreciation code (e.g. 0021) and a matching debit to the “overheads” code (8001). I normally date depreciation journals on the last day of the relevant accounting year. When you look at your balance sheet you should see the relevant “accumulated depreciation” line go up by the amount you entered and the “net book value” line go down, and the same amount will be added to your overheads for the year, reducing your net profit.