After sending the estimate to the customer if you want to send again the estimate there will be another email content. Becuase the initial estimate is already sent. Now the customer  maybe want the estimate again and in all cases this content will be different. Go to Setup-> Email Templates -> Estimate Already Send to Client to edit the email content when sending the estimate to your customer for second time.

Open the estimate you want to convert and on the right side click Convert to Invoice

Client – Before selecting a client you must have added clients Customers->New Customer.

When selecting a Customer the customer informations will be fetched directly from the customer profile you created. Another option is that you can click on the edit icon and directly add the desired customer informations, this also is applied for the billing informations they are also fetched when selecting a customer.

Billing and Shipping – If you change the billing and shipping informations after slecting a client and click on the edit icon, this will be changed for the Estimate but in the customer profile the informations will remain the same and wont be any changes in the Invoice.

Number – Number is automatically populated Eq. 001 next will be 002.

This number its fetched from Setup->Settings->Finance->Estimates  – Next  Number the number its auto increment but you can change the next number in Setup->Settings->Finance->Estimates.

Status – By default the draft status will be selected, you can change the status anytime you want, note that when you send the estimate to your customer the status will be change auto to SENT.

Currency – The currency is automatically selected based on your default currency or currency set for the selected Customer you selected previously in the customer profile. If the currency for this customer is USD it will be automaticly selected and cannot be changed, read more here

Sale Agent – You can select sale agent for this estimate then then generate reports in Reports->Sales->Estimate Report. Note that the sale agent full name will be shown on the estimate if in Setup->Settings->Finance->Estimates -> Show sale agent on estimate is set to yes.

You can add Estimate items, when adding make sure u click on the blue check icon in order the item to be added you can also select tax options see shown in picture.

The items will be stored separately for each estimate and changing the items informations in Sales->Items wont affect the already created estimates with specific item/s.

Admin note is only for admins/staff members.

Customer note is visible to client side also, on the HTML estimate and PDF estimate.

You can setup terms directly in the estimate or you can have predefined terms which will be auto populated. To setup predefined terms and conditions navigate to Setup -> Settings -> Finance -> Estimate scroll down and you can populate the fields as it fits you.

Click submit to save the estimate.

While editing/creating estimate the adjustment option is always available if you want to +- the total amount

Click on the button and choose Estimate or Invoice. After you choose a popup will be shown with the preview info also with the parsed items which are auto inserted to the estimate/invoice.

When you are satisfied from the result click Save.

After converting the proposal will be auto marked as accepted (if is not already marked as Accepted).

Select status or just leave it All and click Submit. All invoices based on your selected options will be added to .zip file.