You've priced a job properly. Three hours' labour, a zone valve, sundries, a bit for the tip run. It comes to £411 and that's a fair price.
Send it as four lines with four prices on it and something happens that has nothing to do with the total: the customer starts on the £27 valve they found for £19 online, and on why three hours. The number was never the problem. Showing your working was.
Hide line prices sends the same quote with the same lines on it, and no price against any of them.
What your customer sees
Everything about the job, and one price for it:
Replace zone valve — 22mm motorised Qty 1
Labour Qty 3
Sundries and waste disposal Qty 1
Subtotal £342.50 VAT (20%) £68.50 Total £411.00
They still get the scope. If you've put detail under a line saying what's included, that still prints too — so this isn't about telling them less, it's about not handing them a shopping list to argue with.
What you see
Everything, exactly as before. Every line, every rate, every quantity, still editable, still totalled the same way. It changes what gets printed on their copy and nothing else — including what goes over to Xero, QuickBooks, FreeAgent or Sage, which carries the full detail either way.
Turning it on
Open the quote and tick Hide line prices, down with the wording and the deposit. The preview beside the form updates as you tick it, so you can see their copy before you send it.
It follows the quote everywhere they meet it — the PDF, the printed copy, the online quote page, and the share link.
Invoices have the same tick box in the same place.
If you work this way on everything
Settings → Business → Paperwork → Hide line prices by default. Every new quote and invoice starts with it on, and you can still untick it on any single one.
When a quote becomes an invoice
It carries over. If they were sent one price for the job, the bill for that job comes out the same way — otherwise the invoice re-opens the conversation the quote closed.
You can change it on the invoice like any other quote.
Two things it deliberately doesn't hide
Options and extras keep their prices. If your quote gives them a choice — three boilers, or a power flush as an optional extra — each one still shows what it costs. They can't pick without the numbers, and a page of unpriced options with a total that jumps when you tick them is worse than either.
On a subcontractor invoice, the labour and materials split stays. That's the figure the contractor takes CIS off, so an invoice that hid it would be no use for the one thing it's for.
The VAT bit, on invoices only
A full UK VAT invoice has to show a price against each line. So if you're VAT registered and the invoice is £250 or more, hiding the prices means your customer can't reclaim the VAT from it.
Mucka tells you on the screen when that applies and leaves it with you, because it's often fine — a domestic customer isn't reclaiming anything. If they are VAT registered, either leave the prices showing on that one, or expect to be asked for another copy.
Below £250 it doesn't arise, and it never arises on a quote.