Before you start
Add the customer under Contacts (optional, but recommended).
Steps
Go to Revenue → Invoices and click Create Invoices → Create manually.
Under Document details, fill in:
Title: what the invoice is for, e.g. Website redesign.
Document number: leave it blank to auto-number (e.g. INV-10000).
Currency, Date and Due date. The due date defaults to 30 days after the invoice date.
Customer: choose from your contacts.
Under Line items, add each product or service:
Item name and Description.
Item quantity and Amount (the price).
Account: the revenue account for this line, e.g. Service revenue.
Tax and Discount, if any.
Click + to add another line.
Optional sections:
Add shipping information: a shipping fee and delivery details.
Add payment information: record money already received, or tick Mark as paid in full.
Split account: share the revenue across two accounts.
Classification: Branch, Employee, Department and Project.
Memo: an internal memo, plus Payment terms that print on the invoice.
Attachments: add supporting files.
Click Save as and choose:
Create to issue the invoice.
Save as Draft to finish it later. Drafts don't affect your books.
What happens in your books
When you create the invoice, Tyms records the sale in the revenue account on each line and the amount owed in Account receivable. When the customer pays, the balance moves from receivables to your bank or cash account.
Can't save?
The yellow banner at the top of the form lists what's missing, for example Item on each line, Category on each line or Price on each line.